Thanks!
Take that drive completely out and install Windows on a new drive, even a cheap 40GB drive, then, once Windows has settled and is working, shut the computer off, add your old drive and start it up, you may have to use BIOS to set the boot order. AFter that you might need to use the drive manager to add the drive, but do not format it.
Do all this carefully and you will be able to peruse the drive without trouble and get the files you need. I think before proceeding you should understand what you are really wana do otherwise you can lose the wallet.dat file and of course the bitcoins.