I saw the two threads about it and did everything, but my PC still freezes sometimes when I turn it on. I've scanned with everything I can and its good for now, but the main problem is that my wireless isn't working. I've examined it deeply and came up with the solution that something may infected my services, as half of them are not running (but set to automatic) and this can also cause the PC to freeze up when it boots. What should I do ? Thanks in advance. EDIT : Also I tried to reinstall my Windows XP Professional (im running asus EEE pc and i have no optical drive) via USB, but when I try to reinstall it says that my drive C is corrupted and cannot be repaired, but its working fine with the old windows (xp prof).