"Generic Host Process for Win32 Services has stopped working", "LoL (TM) Client has stopped working"

I have a problem, after champion select end, my league crashes and shows "Generic Host Process for Win32 Services has stopped working", "LoL (TM) Client has stopped working". I tried looking up various solutions but none of them seemed to work. Some solutions say I should have either Net.Framework 3.5 or 4.0, but I have those. League also requires DirectX 9, which I have as well. Another solution said it was probably just a registry problem. I'm not sure if my computer or my league is the problem but, I'm using Windows 7. I would like to know how to fix this problem, its started to give me penalties ._.