windows 7 locking up

so this issue started about 3-4 days ago, everytime i start windows it starts fine until it gets to my desktop screen, everything works fine for about 5 mins and then everything locks my keyboard/mouse cant go to the task manager or anything.

the issue started after it went to sleep mode and then i shut it off, i removed all my graphics card drivers and programs i added and i still get the same problem, even when i get to the recory system when it says "please wait while windows is recovering/restoring" not sure what it says exactly it will lock up and i have to restart it.

any help will be greatly appreciated.

computer specs:

Intel Core 2 Quad Q6600 3.2GHz OC'd
Asus P5Q-E Motherboard
8GB DDR2 500MHz Memory PC2-6400
300GB Sata Hard Drive
750watt Thermaltake Power Supply
Windows 7 64 bit

i did that and it locked up around step 4 or so , also when i restarted my comp after that lock up , it wanted me to register my windows 7? can it be that i got a bad windows and is just locking everything ?

i really dont know what to do at this point i set everything to default got rid of all the new drivers i installed when i first got it and still get the same problem.

right now is sitting on the main desktop screen and it has been way over 30mins and is fine but i have a black screen that says this windows copy is not genuine.