i use windows xp professional sp2.from yesterday , i am having a strange problem.whenever i double click on a partition ( like c drive, d drive etc.) it refuses to open .also my pen drive doesn't open that way.i have to right click on the drive letter and then click on open or explore to view the contents of the drives.i tried to run the command regsvr32 /i run32.dll but nothing happened . please help me overcome the problem. i don't want re install windows from scratch.i scanned my pc with avast antivirus and spybot s&d but no malware was found on the system.Please help urgently.