The RPC Server is unavailable”

 

COPY from https://social.technet.microsoft.com/Forums/windowsserver/en-US/7bd159cb-fe37-4b5d-b3aa-2e2642f4fc1f/painfully-slow-rdp-sessions-after-ignorereguserconfigerrors-fix?forum=winserverTS

The only way I was able to fix this was by following this suggestion:

Set IgnoreRegUserConfigErrors value

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We may edit the Windows registry on the server to resolve the issue. To do so, follow these steps.

1. Click “Start”, click “Run”, type “regedit” in the “Open” box, and then click “OK”.

2. Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server

3. On the “Edit” menu, point to “New”, and then click “DWORD Value”.

4. In the “New Value #1” box, type “IgnoreRegUserConfigErrors” and then press ENTER.

5. Right-click “IgnoreRegUserConfigErrors” and then click “Modify”.

6. In the “Value data” box, type “1” (without the quotation marks) (one), click “Decimal”, and then click “OK”.

7. Quit Registry Editor.