Hello everyone,

My windows 8 beta 64 bit has been running well since its installation. While this morning, when I booted the computer, I got an error message that shocked me a lot! Windows 8 system said that a dll. file can not be found. But I did not delete any of them cause it is important for my win 8 system. Last evening, it was one of my friend who used my computer. Is it possible that he deleted it mistakenly? If so, how can I recover it?

Many thanks for your suggestions!