My dad has a Dell Inspiron 6000, which I use every now and then, one of the things that has really bugged me about it jaggy images in IE (they are being scaled or something), I did some poking about today (we’re are babysitting at there house..) and found this:

http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/overview/highdpi.asp

I found it here: http://forums.us.dell.com/supportforums/board/message?board.id=insp_video&message.id=79808

He had is DPI set to 120.