For some reason on Server I have this problem of it not acutally turning it off, for stuborn machines, or for a safer way try this
Click Start then Run type cmd, then click ok and type
sfc /PURGECACHE
hit enter when it's done close out of command prompt and you are done
![:P](http://www.x64bit.net/site/board/public/style_emoticons/default/smile.png)