Investigating a possible data theft:
I always switch off my PC before leaving office. This morning I found the switches on and the PC on too. The screen was locked, so when I logged in with my username and password, I was logged in, and the moment I logged in, the PC started shutting down. No viruses in the system.
The network allows us to log into any PC using our id and password, but if we're not logging into our own PC, we can't access any of the files of somebody else's PC we logged into.
I'm suspecting that either someone logged into my system with my id and password, or they logged in using their id and password (if they did, a new folder would have got created in Documents and settings with their name, but it didn't) and the PC didn't shutdown completely when they left.
The other possibility is that I didn't shutdown my PC properly, because I have a vague memory of giving a shutdown command and the PC wasn't shutting down because it could not end Winamp. I do remember manually ending Winamp and the blue shutdown screen coming up.
So what kind of a situation can cause the PC to start shutting down the moment one logs in?