We have a Dell PowerVault NX-3000 server running Windows Server 2008. Every now and then, when I try to login, the server seems to hang at the Welcome screen after I type in the password. However, all other services on the server are running fine - users are able to print off the print server and access their files. It just won't let me login. Any idea why this is happening?

P.S.: I can't look at the server logs, because it won't let me login in the first place. Remote administration is also disabled on the server, so I can't use Remote Administration tools to look at the logs.