hi i have virus data base which make hard disk as autorun and hide all hidden folder ( folder hide option in active)
there is two file one is autorun.inf & other is explore.(something - i had forgotten.)
Welcome to the forums, pintu_atul. 
I do not understand what you are asking. Can you please write what it is you want in a different way?
OK I follow it is an auto run malware : Relatively easy to fix (Famous last words)
Hi pintu_atul
Download ComboFix from Here or Here to your Desktop.
[*]Double click combofix.exe and follow the prompts.
[*]When finished, it shall produce a log for you. Post that log and a HiJackthis log in your next reply
Note: Do not mouseclick combofix’s window while its running. That may cause it to stall
no man there is a virus named as autorun.inf and it make ur hard drive like Local Disk(c): or other hard drive make it autorun means open it in new window not in same window and it has one more component explorer.(some extension that i had forgotten) and it delet ur folder option from ur pc. and also it make task manager not working…
clear???
You and Essexboy are saying the same thing in different ways. Follow his advice regarding ComboFix