VBS.autorun.worm.aadd!lnk and vbs.autoron.worm.aapp how can i remove this virus,and removal of short cuts in xternal drives

Hi Prasanth,

Worm:VBS/Autorun is a worm that spreads by dropping copies of itself onto all available removable drives. It also modifies system security settings.

I would suggest you to follow these steps and check if it helps.

Perform a scan using Microsoft safety scanner and check if it is an infection that is causing this issue.
http://www.microsoft.com/security/scanner/en-us/default.aspx

Note: The Microsoft Safety Scanner expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again.
Any data files that are infected may only be cleaned by deleting the file entirely, which means there is a potential for data loss.

Refer to the article:
How do I find and remove a virus?
http://windows.microsoft.com/en-us/windows-8/how-find-remove-virus

The task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Let us know if it helps.  If the issue persists, please reply, we will be happy to help you.