Installation Problem

After installing, when I try to play, I get an error message stating that some application files are damaged or and that I should reinstall or redownload the client. I've tried both, but neither have worked.

"you probably installed it on your win7 partition. run it as admin or install it somewhere else" - Anonymous

It worked for me. Right click and left click on run as administrator and the message didn't appear. If your not a win7/vista i don't know what to say