intelc52 and the solution

Ok- I read some of the previous posts on the subject... but that doesn't really help me any. You see, the computer that is having the problem is about 340 miles away from where i am.(i am fixing it for a friend)- And she gets a blue screen that more or less says that i need to turn video shadowing off. Now before, you said it was right when the computer started up. Im running a HP computer, so like f1 is boot setup -esc is something else and so on. But none of the places that any of the buttons take you have a place to turn video shadowing off- The only problem is, is her compter is a dell... and im assuming that she would have similar screens come up- and from what ive been trying to do, there isnt a way to do it once the computer is booted.... so i guess what im asking is- how the heck do you turn the stupid video shadowing off? I mean ive been working on it for about 2 hours now, and cant find the right ...."pre boot menu" to be able to disable it. If you have anything of any use please let me know, especially if you have a dell or have had the same problem. The problem ive heard usually originates from a cannon scanner. If i cant turn the video shadowing off ill have her uninstall the driver for it... but i would like to keep it working if at all possible. thanks again