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When I remote into my Windows 8 desktop with Windows 7 it works fine but when try with Windows 8 I get an empty screen after it connects. Keyboard commands work despite the screen being black; I can open Explorer etc. using them and they persist when I reconnect with Windows 7.

Any ideas on what is wrong?

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Have you fully patched both computers including option updates? (RDP version 8.0 has come out several weeks ago on Windows 7 and maybe also on 8). –  harrymc Jan 10 '13 at 15:06
    
In addition to @harrymc's suggestion, take a look at the source Win8 RDP settings. Also, are the source (Win7 and Win8) hosts on the same LAN as the target Win8, and the NIC and Comms port speeds verified OK? Lastly, try different NIC ports for the source hosts on your switch. –  Lizz Jan 11 '13 at 6:35
    
Does changing the Windows 8 theme have any effect? On the Experience tab for Remote Desktop Connection, what happens if you connect choosing Modem (28.8 Kbps) and deselect Bitmap Caching? –  user117859 Jul 30 '13 at 1:13
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2 Answers

A Technet thread suggests typing Ctrl + Alt + End, then cancel, then exiting and reconnecting: http://social.technet.microsoft.com/Forums/en-US/winserverTS/thread/31b681c5-3658-45a5-8158-a0a0f967c4a2

You could also try disabling bitmap caching http://support.microsoft.com/kb/555840

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Link-only answers are a no-no, due to possible future link rot. Please include pertinent information directly in your answer. –  techie007 Jan 13 '13 at 17:53
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Microsoft is usually pretty good about keeping links up, especially KB articles. –  K.A Jan 13 '13 at 18:17
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This doesn't work unfortunately –  Michael Jan 17 '13 at 17:42
    
It might not be the same issue - the one in the link is Win Server 2008. At least in my case, nothing happens when I press Ctrl-alt-end, the screen is just black. –  AD. Nov 27 '13 at 14:34
    
@K.A, Tell that to silverlight.net –  Joel McBeth Dec 27 '13 at 21:53
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up vote 0 down vote accepted

Open the Local Group Policy Editor on the machine you are running the Remote Desktop client.

Under Computer Configuration>Administrative Templates>Windows Components>Remote Desktop Services?Remote Desktop Connection Client

Enable the setting called Turn Off UDP On Client

Now I'm able to connect without issue... somehow UDP isn't making it through and this change fixes the problem!

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