Hey guys.. I had some good help last time but now here is whats happenieng

As soon as I turn the computer on, the Windows explorer keeps closing itself, tries to re-open it and then close again. Now I am working with the task manager to connect to internet and all.

I have tried running latest virus san with trend micro standalone, ewido, spybot and Microsoft Antispyware. but it did clean some malware but not this problem.

I have a hidden folder by name of cmdcons in the root, with some system files and "smss" .. Is this supposed to be there? Is it the cause?

Help me out.. I got no explorer!

bye.