Thanks for letting me know
Is it only the register system files that does it? You can edit the list of files it registers in the files folder. I haven't seen this problem on other versions of Windows, xp 64 bit is one of the systems I haven't used. Xp 32 bit and then vista and 7 32 & 64 bit are the ones I test on the most.
Let me know what you find out and I can update the repair to better handle it
Shane