sir i have toshiba laptop L640 which consist of i3 processor , 3 gb ram and 320 hard disk. yesterday my windows corruped. i install fresh window 7 deleting all drives and every data of my laptop . now i am facing problem that when i start my laptop it takes lot of time near about 3-4 minutes to start . it freezes on windows 7 logo for 3-4 minutes . and after that it works perfectly. now even i install nothing on my laptop but same problem. i also try windows xp on my laptop but again same problem without installing any software even i did not install its driver also. pls give me solution.