Scan with any good anti virus and if you get some infection like 'WVCST.VBS' delete them.If you get nothing do following:
Click Start, Run and type:
reg add hkcr\drive\shell /ve /d none /f
Alternately, to do this manually via registry:
Set (default) to "none" (without ")
hope this may solve your problem :D
Chetan Gole is web enthusiast and blogger who loves all things design and technology. He is a Software Engineer by profession. Blogger, photographer, techie by hobby. Find him online on Facebook, Google+, Twitter. read more...