Reinstalling your software, is one of option to get best performance of your computer. Infected computer with lots of worms or virus, sometimes required more time to get your operating system working well. You have to manually delete some file or repair it on the registry. Some are solved with driver updates, by uploading the latest driver.

But for those who doesn’t want to waste more time to find it, reinstalling all of your windows drivers. Note: this action effective to handle worm infection which attacking your hardware.

If the worms / virus still messing up your registry, the best way to perfectly clean it, by reinstalling your operating system. Some works just with replacing the old registry and windows file, but for some others you just got to backup your file and start with fresh installation.

With fresh installation, your computer just like a teenager, speed and performance are reliable, but you should gave your time for backup your old data. And prepare all of your computer drivers. While reinstalling it, only replace the old registry, the performance itself will became like your computer before it infected.

Which one better, depends on your case, but whatever the choice is, its recommended to secure your data in other storage before you do it.