When we boot up a test Windows Server 2012 R2 we get the alternative shell command - runonce.exe. We can't seem to get into the GUI. We can run notepad, powershell, Task Manager but not Explorer, MMC, etc. We tried to delete/rename the runonce.exe but it says we don't have sufficient rights - we are logged in as administrator. We have tried the attrib command but the file is marked as A and we can't seem to change that attribute. Any suggestions? Thanks in advance.