Every few days or so the Shares and Redirected folders become unavailable to the users who had been logged on and were constantly accessing these same shares. Even from the sever when you go to Computer each share has a red X. I have to restart the server for the shares to become available once again.
On occasion when I logon to the server the desktop didn't load correctly, has a black background, and a quick message about not being able to connect to Windows Service without giving detail on which service. This also requires a restart.
I have removed WSUS because of an issue with it but that is the only change from the original setup. These problems started before this uninstall.
Nothing in the event log seem to stand out.
Check your running processes to see if anything irregular is hogging resources. By default SQL and Exchange will take as much RAM as possible.
If you're able to log into the server when it happens then I would check your auto start services as well as the resources.
Have you checked all the event logs? DNS etc