why does this keep happening?

Lion

I keep getting this error code (0xc00005) whenever i want to start up one of my games. I tried many different methods from youtube to try and fix it. Nothing has worked. It’s weird because sometimes my games start up no problem but then other times i get this error code and it’s starting to get annoying. Is there something i need to replace or fix? I need help figuring this out. 

Vaganza

Might try a repair install of Windows. From time to time I Run the windows installer within Windows, it keeps everything intact but replaces files that may be missing or damaged

Lion

How can i do the repair install?