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I have a Dell XPS 13 with Windows 10 that I recently updated to 1607. One of the major roles for this machine is to use Remote Desktop to access individual servers in my data center. Previous to the upgrade, I had added PreferExternalManifest a key in HKLM/Software/CurrentVersion/SideBySide, set to 1, and then had an external manifest for the mstsc.exe. Without this, when I used RDP to access servers, the resolution was so high as to make reading the remote session very hard. Everything is tiny. With the external manifest, I can see the remote sessions.
After the update, the key was gone. I went to HKLM/Software/CurrentVersion/SideBySide and added the key, again. The external manifest for MSTSC was still there. After a reboot, I found that the MSTSC.exe would not start. The desktop icon didn't work. Running the command from a prompt didn't work. No error reported. I remove the key and reboot, and RDP works again, but I can't read the remote session.
I see that I can use the system menu and zoom the remote session, if I give up full screen. I like full screen. Do I have a choice of giving up full screen or a life of squinting? Is there a way that I can have a full-screen RDP with a remote session resolution that I can see without squinting?
TIA
Skip Saillors
Posted 2016-08-20T18:36:10.737
Reputation: 111
I have the same situation, this was working since the last Windows 10 update. Now if the key is set mstsc.exe silently fails to execute. So annoying – Adam Marshall – 2016-08-24T21:44:51.147
Not strictly an answer, but rolling back the update definitely works http://answers.microsoft.com/en-us/windows/forum/windows_10-other_settings/since-windows-10-anniversary-update-remote-desktop/7b57aa3f-533a-4a5b-b545-0a2ac1cdf959
– Adam Marshall – 2016-08-25T19:46:04.120