Enable Windows Photo Viewer in Windows 10

In windows 10 Windows Photo Viewer is gone.
Here is how to activate it.
Download the following regkeys.
Activate-Windows-Photo-Viewer-on-Windows-10

When runned. Right click on a picture. Goto open with, Choose another app.

Now you get a list, Select Windows Photo Viewer and check Always use this app to open .* files.

Source: howtogeek.com

Here is the XML for GPO import Registry. Save as XML and drag and drop it in Computer Configuration > Preferences > Windows Settings > Registry

<Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="Windows Photo Viewer" changed="2016-09-20 14:00:00" uid="{26D98409-EB77-4970-B752-C90AD76A92FE}" bypassErrors="1">
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="MuiVerb" status="MuiVerb" image="7" changed="2020-03-20 12:54:01" uid="{818C8763-9895-4F80-B735-60F27C4386BB}">
		<Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="Applications\photoviewer.dll\shell\open" name="MuiVerb" type="REG_SZ" value="@photoviewer.dll,-3043"/>
	</Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:54:07" uid="{36B81D47-DC5E-449D-9723-A561E07949E4}">
		<Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="Applications\photoviewer.dll\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/>
	</Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:54:14" uid="{8BAF044A-5CF7-4CCD-BAC3-933887108900}">
		<Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="Applications\photoviewer.dll\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/>
	</Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:54:21" uid="{59D93675-BF4C-4FC3-80EF-46BE54D187D2}">
		<Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="Applications\photoviewer.dll\shell\print\command" name="" type="REG_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/>
	</Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:54:29" uid="{1C3BE016-D09D-4098-B16B-0F5D5E51B3E7}" bypassErrors="1">
		<Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="Applications\photoviewer.dll\shell\print\DropTarget" name="Clsid" type="REG_SZ" value="{60fd46de-f830-4894-a628-6fa81bc0190d}"/>
	</Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ImageOptionFlags" status="ImageOptionFlags" image="12" changed="2020-03-20 12:19:23" uid="{0B0E13E5-06CE-4A7C-A6AA-0EA1CE3D191D}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Bitmap" name="ImageOptionFlags" type="REG_DWORD" value="00000001"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="FriendlyTypeName" status="FriendlyTypeName" image="7" changed="2020-03-20 12:15:22" uid="{4BCEE34B-B09E-4116-A9A0-61613EBCDD80}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Bitmap" name="FriendlyTypeName" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll,-3056"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="DefaultIcon" status="(Default)" image="7" changed="2020-03-20 12:17:22" uid="{1BAA4738-5084-4302-AAC5-ED99DF4B71DC}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Bitmap\DefaultIcon" name="" type="REG_SZ" value="%SystemRoot%\System32\imageres.dll,-70"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:17:16" uid="{DE804BCD-86BE-4874-A373-A548C47F2D9A}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Bitmap\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:18:21" uid="{5354AA59-F6C7-44C9-8E05-BCEC2DEF680B}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Bitmap\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="EditFlags" status="EditFlags" image="12" changed="2020-03-20 12:19:16" uid="{FD1440E7-AAFB-40DA-8762-6F964927E1B2}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF" name="EditFlags" type="REG_DWORD" value="00010000"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ImageOptionFlags" status="ImageOptionFlags" image="12" changed="2020-03-20 12:20:06" uid="{60940264-3F52-4F23-BC7D-C751D3E9469F}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF" name="ImageOptionFlags" type="REG_DWORD" value="00000001"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="FriendlyTypeName" status="FriendlyTypeName" image="7" changed="2020-03-20 12:22:31" uid="{AC3FCD87-45F1-42EA-A514-9E893190BC57}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF" name="FriendlyTypeName" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll,-3055"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="DefaultIcon" status="(Default)" image="7" changed="2020-03-20 12:23:38" uid="{8ADEB44E-D03A-40DD-9D14-13D55A87E8AD}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF\DefaultIcon" name="" type="REG_SZ" value="%SystemRoot%\System32\imageres.dll,-72"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="MuiVerb" status="MuiVerb" image="7" changed="2020-03-20 12:24:27" uid="{FADE9D5A-46D1-4248-B4E1-056656732D6E}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF\shell\open" name="MuiVerb" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\photoviewer.dll,-3043"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:25:20" uid="{FDB758AC-5178-4576-88E4-BEB4E9907B83}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:25:58" uid="{DF76ED93-D126-492D-A855-C63CD9D979A9}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.JFIF\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="EditFlags" status="EditFlags" image="12" changed="2020-03-20 12:26:42" uid="{3557C4B9-01EC-4DF7-98A8-5B9CA421F7EF}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg" name="EditFlags" type="REG_DWORD" value="00010000"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ImageOptionFlags" status="ImageOptionFlags" image="12" changed="2020-03-20 12:27:07" uid="{B2181548-7565-4AC0-A466-E657C274AF3A}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg" name="ImageOptionFlags" type="REG_DWORD" value="00000001"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="FriendlyTypeName" status="FriendlyTypeName" image="7" changed="2020-03-20 12:27:44" uid="{76EB2C26-3E65-4ABD-9A40-3E34C5A1B5A6}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg" name="FriendlyTypeName" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll,-3055"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="DefaultIcon" status="(Default)" image="7" changed="2020-03-20 12:28:43" uid="{7D74558A-ACAE-4E43-AF78-A67864384762}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg\DefaultIcon" name="" type="REG_SZ" value="%SystemRoot%\System32\imageres.dll,-72"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="MuiVerb" status="MuiVerb" image="7" changed="2020-03-20 12:29:24" uid="{C743374F-B65C-4AA4-A7EB-E066B9AD91C0}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg\shell\open" name="MuiVerb" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\photoviewer.dll,-3043"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:30:16" uid="{BDB3DBC8-A056-480B-8334-0C322BA6AB03}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:30:53" uid="{4DEF65EC-E6BB-4FB0-AE02-187678BBD7C7}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Jpeg\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ImageOptionFlags" status="ImageOptionFlags" image="12" changed="2020-03-20 12:31:37" uid="{A4C76D3A-741D-4E0E-AFD2-5F25F938BDFB}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Gif" name="ImageOptionFlags" type="REG_DWORD" value="00000001"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="FriendlyTypeName" status="FriendlyTypeName" image="7" changed="2020-03-20 12:32:08" uid="{177AF4D6-CD2E-42C9-98C6-DA4973C2A765}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Gif" name="FriendlyTypeName" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll,-3057"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="DefaultIcon" status="(Default)" image="7" changed="2020-03-20 12:33:00" uid="{0784BD34-64B6-4058-995B-1023865586A9}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Gif\DefaultIcon" name="" type="REG_SZ" value="%SystemRoot%\System32\imageres.dll,-83"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:33:36" uid="{10C4DFA6-08E0-4898-9777-50E00E8505DD}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Gif\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:34:40" uid="{B3FE350F-2A1A-4845-8F63-C7440AAE79D2}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Gif\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ImageOptionFlags" status="ImageOptionFlags" image="12" changed="2020-03-20 12:38:02" uid="{D2B47B31-919D-4F3C-9CAD-6CB3E089ADD4}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Png" name="ImageOptionFlags" type="REG_DWORD" value="00000001"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="FriendlyTypeName" status="FriendlyTypeName" image="7" changed="2020-03-20 12:39:19" uid="{0C83CF63-7F85-4DCC-8400-4C9CB8F9DF5B}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Png" name="FriendlyTypeName" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll,-3057"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="DefaultIcon" status="(Default)" image="7" changed="2020-03-20 12:40:04" uid="{7582A529-CE69-417A-B060-74DAB25E3A54}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Png\DefaultIcon" name="" type="REG_SZ" value="%SystemRoot%\System32\imageres.dll,-71"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:40:51" uid="{FF654653-73C2-43EC-9FCE-24AD79738C43}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Png\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:41:45" uid="{BE45829D-6D4D-48C3-B701-E940226B566D}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Png\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="EditFlags" status="EditFlags" image="12" changed="2020-03-20 12:42:12" uid="{EC5A9C82-4D8C-4E71-8C65-3F521A5B7470}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Wdp" name="EditFlags" type="REG_DWORD" value="00010000"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ImageOptionFlags" status="ImageOptionFlags" image="12" changed="2020-03-20 12:42:38" uid="{44A34E0B-992D-4EE4-975A-427FA376C81A}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Wdp" name="ImageOptionFlags" type="REG_DWORD" value="00000001"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="DefaultIcon" status="(Default)" image="7" changed="2020-03-20 12:43:11" uid="{B704F2DE-70D1-44A5-900B-609D466739F2}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Wdp\DefaultIcon" name="" type="REG_SZ" value="%SystemRoot%\System32\wmphoto.dll,-400"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="MuiVerb" status="MuiVerb" image="7" changed="2020-03-20 12:44:03" uid="{C3877333-B9B3-4F8F-B487-7735FEF9DC6E}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Wdp\shell\open" name="MuiVerb" type="REG_EXPAND_SZ" value="@%ProgramFiles%\Windows Photo Viewer\photoviewer.dll,-3043"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" status="(Default)" image="7" changed="2020-03-20 12:44:30" uid="{EF90B883-3446-45DF-A9F8-7CABFA4ADB09}"><Properties action="U" displayDecimal="0" default="1" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Wdp\shell\open\command" name="" type="REG_EXPAND_SZ" value="%SystemRoot%\System32\rundll32.exe &quot;%ProgramFiles%\Windows Photo Viewer\PhotoViewer.dll&quot;, ImageView_Fullscreen %1"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="Clsid" status="Clsid" image="7" changed="2020-03-20 12:45:06" uid="{97368AB3-C0A6-4D93-8AB0-05CB8C528E37}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_CLASSES_ROOT" key="PhotoViewer.FileAssoc.Wdp\shell\open\DropTarget" name="Clsid" type="REG_SZ" value="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ApplicationDescription" status="ApplicationDescription" image="7" changed="2020-03-20 12:46:50" uid="{C24BFFF8-7CC2-4157-88F6-832B29C14CF1}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities" name="ApplicationDescription" type="REG_SZ" value="@%ProgramFiles%\Windows Photo Viewer\photoviewer.dll,-3069"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="ApplicationName" status="ApplicationName" image="7" changed="2020-03-20 12:47:13" uid="{F197301F-7DE8-44DA-A71C-529226A54C08}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities" name="ApplicationName" type="REG_SZ" value="@%ProgramFiles%\Windows Photo Viewer\photoviewer.dll,-3009"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".bmp" status=".bmp" image="7" changed="2020-03-20 12:47:48" uid="{04687C41-7FC7-4FDD-970B-2C029D38C57F}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".bmp" type="REG_SZ" value="PhotoViewer.FileAssoc.Bitmap"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".dib" status=".dib" image="7" changed="2020-03-20 12:48:26" uid="{2C81593E-4406-4938-8C26-70E80ADC3162}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".dib" type="REG_SZ" value="PhotoViewer.FileAssoc.Bitmap"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".gif" status=".gif" image="7" changed="2020-03-20 12:48:49" uid="{7D3386C2-D482-4E6D-A8AB-C6C3E16D5E5F}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".gif" type="REG_SZ" value="PhotoViewer.FileAssoc.Gif"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".jfif" status=".jfif" image="7" changed="2020-03-20 12:49:09" uid="{79162896-0EB2-4382-BD9E-DDA23A1823B2}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".jfif" type="REG_SZ" value="PhotoViewer.FileAssoc.JFIF"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".jpe" status=".jpe" image="7" changed="2020-03-20 12:49:37" uid="{A22C4574-B35F-45B9-B8A4-8A339221E911}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".jpe" type="REG_SZ" value="PhotoViewer.FileAssoc.Jpeg"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".jpeg" status=".jpeg" image="7" changed="2020-03-20 12:50:08" uid="{E2AB304C-3E6D-4A8F-8DB7-B3D82E6D24BD}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".jpeg" type="REG_SZ" value="PhotoViewer.FileAssoc.Jpeg"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".jpg" status=".jpg" image="7" changed="2020-03-20 12:50:32" uid="{98050833-9901-48CF-BDCF-3246D6CBD430}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".jpg" type="REG_SZ" value="PhotoViewer.FileAssoc.Jpeg"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".jxr" status=".jxr" image="7" changed="2020-03-20 12:50:53" uid="{BE414F2F-F6AF-4BF1-94BF-B9349D306FDB}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".jxr" type="REG_SZ" value="PhotoViewer.FileAssoc.Wdp"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".png" status=".png" image="7" changed="2020-03-20 12:51:18" uid="{2607795B-A4E5-49B6-9074-F5B2A52DBFDF}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".png" type="REG_SZ" value="PhotoViewer.FileAssoc.Png"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".tif" status=".tif" image="7" changed="2020-03-20 12:51:43" uid="{73097066-8C4B-4D0B-BDE1-C123791EFD98}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".tif" type="REG_SZ" value="PhotoViewer.FileAssoc.Tiff"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".tiff" status=".tiff" image="7" changed="2020-03-20 12:52:02" uid="{7FC5395F-FEAE-45D1-B0B6-0B8B9EDFB6C2}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".tiff" type="REG_SZ" value="PhotoViewer.FileAssoc.Tiff"/></Registry>
	<Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name=".wdp" status=".wdp" image="7" changed="2020-03-20 12:52:27" uid="{F81A621E-1D6F-494E-9BC4-595A750BF82D}"><Properties action="U" displayDecimal="0" default="0" hive="HKEY_LOCAL_MACHINE" key="SOFTWARE\Microsoft\Windows Photo Viewer\Capabilities\FileAssociations" name=".wdp" type="REG_SZ" value="PhotoViewer.FileAssoc.Wdp"/></Registry>
</Collection>

Windows 10 Professional 1703 – Turn Off Automatic Installation of Suggested Apps

For Windows 10 Professional it is not possible to do this with GPO. So add in the GPO this to the register.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager

SilentInstalledAppsEnabled DWORD
0 = Disable
1 = Enable

I Also disabked PreInstalledAppsEnabled

Located HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager

PreInstalledAppsEnabled DWORD
0 = Disable
1 = Enable

Send emails from functional mailbox to send box of that mailbox

We have Multiple mailboxes. Standard is when you send an email from those mailboxes, the emails are in your own send box. By adding this regkey it will be placed in the mailbox of where you send it from.

This is for Outlook 2010. Change 14.0 to the correct version. (Save the file as *.reg and run it)

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences]
"DelegateSentItemsStyle"=dword:00000001

14.0 = Office 2010
15.0 = Office 2013
16.0 = Office 2016