I was on my computer, and I hit ctrl+alt+delete to bring up the task manager (winXP), and I was in the "Processes" tab. I saw svchost.exe was taking up a rather large amount of power, and even though it was a "SYSTEM" process, I shut it down.
After I did that, another appeared, and I shut that down too, only to see a window telling me to save everything because in 50 seconds my system would shut down.
Is this really a system file, or do I have some type of trojan?