Try to get your video card drivers installed. Could you supply us with your system specs so that we could guide you to the driver installation site.
If image is fuzzy, its more likely to be a driver issue. Based on your post, you have not installed any drivers atleast for the video card, so give us your computer specifications and we'll try to provide you with the correct drivers.
And no, you cannot rollback to your previous windows if you had formatted your harddrive, assuming you did when you ran the xp installation. And secondly, it doesn't matter what cd you used to install the OS, that would have no effect on your clarity of your screen. Hope this answers some of your questions.
Desktop - DualBoot: Fedora 15/Windows 7 64bit
Netbook - Windows 7 Professional
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