I started having the same exact problem this morning. When I would login to my virtual machine from the View Client, I would get the following error message: "The display protocol for this desktop is currently busy processing a request. Please contact your system administrator."
I fought the problem for about 3 hours and finally called tech support. He looked at some internal engineering KB and had me do the following:
From the console on the problem machine:
1. Went to the registry folder: HKLM\Software\Microsoft\Windows NT\CurrentVersion\Perflib\009\
2. From within that folder, look at the Counter string. My problem machine was completely blank under the Counter string. I went to a known good vm and looked at the same string, which had many different items in the string value.
He then had me go to the known good machine and copy the following 2 files (perfc009.dat and perfh009.dat) from c:\windows\system32\ to the same folder on the problem machine. When I started copying the files, it asked me if I wanted to overwrite the existing files. It seemed to be the perfc009.dat that was the problem file because when it asked me to overwrite the file, it said that I was going to change the file from a 0 kb file to a 73 kb file.
Once I copied the 2 files over, I immediately tried logging into the problem machine (without rebooting it) and was able to login successfully.
Now I can go to the Counter string in the registry, and it is no longer blank like before.
I asked the tech if he would try to get that internal engineering KB added to the general KB site, so we as end users would be able to search this fix.
I hope this helps you resolve your problem.
