well, today i was playing a game and my treatfire came up and said i had a virus. so i killed it and it said i needed to reboot. so i did. it came back on, now NOTHING is on. not my start menu, no desktop icons, i can't right click. i can start things up and view files but i have to do it manually. any ideas on how to fix it? i've already tried "last known good configuration" and safe mode and all that. idk what else to do besides take it back to the guy that just did my computer. but i don't think he'll be too happy about it.