i have intel p4 pc.i formatted it.when i connect broadband IE works fine for the first time but then IE got corrputed.i format all drive and install a fresh xp.after it i installed LAN CARD DRIVER from a cd.But again IE worked only one time then again corrupted.Now i tried to install avast ,avira,avg ,kasperasy but none of them got installed.There is no data in my xp.plz tell How to overcome this ?