Malacisou script - Norton Antivirus

[mraji]

Hi,

When I boot the system the first time every day, I receive a message from Norton Antivirus -

Malacious script
File mrextract.exe
Script stopped

If I press ok it goes away and does not appear again until next day when I boot the system. What could be the problem and how can I remove this malware if it is indeed.

Thanks
Raji