Delete autorun virus without using any softwares

Hi below is the trick which you can open any virus affected Hard disk or Pen drive without installing any softwares..
Below is the trick which you can get rid of the problem...
Enjoy opening in a single click..
1. Open command prompt. Go to Windows, then Run, and type "cmd" . Press enter.
2. Type "cd\" and press enter to get to the root directory of c:\ .
3. Type "attrib -h -r -s autorun.inf" and press enter.
4. Type "del autorun.inf" and press enter.
5. Repeat the same process with other drives, type "d:" and do the same thing. then next "E:" and restart your computer.
Note: Dont click without restarting on first time..