My video files on my computer are playing with a grey fade over them and the bright parts in some videos are blurred i have tryed reinstalling drivers, reinstalling windows, taken out everything i have installed recently and defraged so much there is no more fragmented files, can anyone help?

Never heard of that. Did you add any new software lately other than the driver updates, etc..

I've just installed Age Of Empire 3 recently :?

You could try first saving all info for that game then uninstalling it and see what happens. Also access device manager and see if there are any (!).

Make sure you have proper video codecs installed!

Also, does this happen only with RCT3 Videos? Or with any videos in general ?

Any Specific movie type ? ( wmv, avi, mov )

I tryed taking out Age of empires 3 and the problem continued. It happens to all media types including playing DVDs.

Do you have a built in video card?