This is what you do u lamer:
1. ctrl + alt + del
2. start task manager
3. open processes tab (pls provide us with a screenshot)
4. check which process is taking up resources (pls tell us which one is causing trouble)
5. kill it with right click + end process
6. click on start
7. type msconfig into search
8. check startup tab (screenshot pls) and disable the problematic startup item; if the troublemaker is not listed goto 4
9. click on services tab - find and disable the problematic process
10. delete all porn on F:
11. download:
http://www.almico.com/speedfan.php ; check cpu and gpu temperatures (pls tell us what they are); "gaming causes lockups" - its possible that either the cpu or gpu are throttling because they are overheating
12. are you perchance using an SSD?