winlogon error

[johti]

hi all,
recently im having problem to login to my laptop. im using window XP SP2. all my antivirus are up2date. i believe its not a virus/malware attack.
i could login to my system, everythg seems fine, but once i login, i dont able to see any image. i mean the screen is empty. but i notice all the services are running as ussual in the task manager. i can open services, event vwr ++ using the task manager-> new task. but i dont see anythg on my desktop. i think this is most probably because of the winlogon error where several files are missing. please kindly advise. wat shall i do.

[johti]

i have tried to do sfc /scannow and also tried run misconfig and unchecked all services under startup tab but no changes. I'm confused!..
i had also copied explorer.exe from other pc which is working fine and copy inta c:/window but still the same. and even i tried to edit the regedit by paste the vbs script... please help me..its really mind-boggling.