I run AVG and I keep getting this virus Trojan Horse BackDoor.hacdef.C and I can't seem to get rid of it no way no how. I don't know if its that virus that is causing me to reboot like crazy. I open realplayer, and go to library then it reboots. I open up a game it reboots. Or when I remove it to "the vault" with AVG it gives me a CD-ROM error and still reboots on realplayer. I don't know how to get rid of it. If any one could help me, I would be very very grateful. Another thing is when I right click on a shortcut on my desktop it makes the screen flash then it reloads everything on my screen. Not a reboot but a reload of whats on my desktop including my task bar.