How to download windows 8 fix online game?

Hello guys,
How to download windows 8 fix online game? I am using windows 8 operating system and a processor speed of 2.1 gghrtz. Some of my games are in need of assistance and care so that they will not be corrupted by viruses and I am just thinking if this application is available for free over the internet.
Your suggestions and advice are much appreciated.
