Virus set my files in all drive to hidden. SOLVED!

VIRUS SET MY FILES IN ALL DRIVE TO HIDDEN... SOLVED !SOLVED!!! Virus set all my files to hidden
ENTIRE DRIVE

1. Go to Start, Run, type cmd

2. Dos command prompt will open, type cd\

3. Now type the drive letter in which you want to Unhide the files lets suppose in my case its C: this will open the C: drive

4. If you want to see all hidden files and folders  ~  type C:\>dir/ah

5. Now type