|I HAVE EDITED THIS POST (in case you saw it earlier).|
I assume you rebooted after scannow.
Ooops, sorry about asking for the exact error message. It was clearly given so I must have been thinking about another post.
It does sound a bit tricky without an XP CD.
I think you meant BROWSEUI.dll rather than BROWSREUI.dll in that error message. I can send you one but the chances are that other files are corrupted too. It can be put in using a Linux Live CD (such as Puppy Linux), run directly from the CD by booting with it in the drive. When you remove the CD you go back to where you were. The CD would have to be made by burning an image (ISO) on another machine and the CD in your dud machine would need to be made "first boot" from BIOS.