windows 2008---"systemprofile\Desktop unavailable" error

[ivanhs]

Hi everybody, I have a windows 2008 server(windows 2008 R2 64bit / HP DL380 G6), when I login through "mstsc" (local adminstrator), the desktop seems like in safe mode, and it shows some error below:

"C:\Windows|system 32\config\systemprofile\Desktop refers to a location that is not unavailable. It could be on a hard drive on this computer or on a network. Check to make sure the disk is properly inserted or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location."

"Windows could not connect to the Group Policy Client Service. this prevents limited users from logging on the system. As an administrative user, you can review the System Event Log for details about why the service didn't respond."

I checked all the services status, and start the ?System Event Notification Service? service which is set to automatic, but it is not started, then I logoff, and relogin through ?mstsc?, the error message didn?t show again, it turn to normal (short loading time; no error message).

But 1 or 2 days later, the OS shows the same error again, so what can I do?

Thanks a lot!