Hi. i use a dell pc with win xp home edition sp1, i started to download the sp3 and appears a blue screen when reeboot the machine. 1st start the win boot screen, then reeboot again and again, i lefted for 2 hours to see if the problem correct automaticly and nothing happend. 2nd time i turned off the machine, when i turned on after the boot screen appears the blue screen with: stop:c0000135 {unable to locate components} this application has failed to start because winsrv was not found, re-installing the application may fix this problem. the problem is that i cant start windows, every time that i turned on this blue screen appears at the beggining, PLEASE ANY SUGGESTIONS. Thanks