If you must do so, download the file into a separate folder on your hard drive and scan it with anti-virus software before running it. Update virus definitions frequently . Keep your virus definitions current by updating your anti-virus software at least every two weeks. Symantec regularly posts programs you can download to remove a worm from your computer. The programs scan your hard drive for unusual changes and reverse them, cleaning up the worm in the process.
Prevention is better than treatment.
Using proper security measures, you can avoid being infected altogether, saving your computer from the wrath of the insidious worm.