If your games arent working try this corruption fixer..
if still no luck try cpu speeds, advanced options and disabling plugins.
this no umd driver IS buggy and they are releasing a fix for it in the next day or two
dont mean to be picky but this site did used to be against devhook because it was able to use iso`s but now something that is meant specifically for iso`s.. even worse iso`s without the need for a disk in the drive is being touted as a great thing..
like I said I dont mean to be picky as youre a fool if you dont use iso`s but why the sudden turn around?