How to delete the viruses easily a simple method

Everyone now using many different antivirus programs and firewalls,using firewalls is must to prevent from online virus,but using antivirus sometimes slows down the PC,so one simple way is if you want to copy files from pen-drive which is higher GB capacity then checking whole pen-drive for virus takes more time,Instead if you have Ubuntu(linux-based OS) cd if you don't have just download it from "www.ubuntu.com" or order a free cd from http://shipit.ubuntu.com and install Ubuntu within your windows xp and check your pen-drive using Ubuntu you can easily delete the virus,unwanted Trojan horses,.exe files,adware etc... and keep system safe and save lots of time.