No. I think that's just a coincidence.
How was this workbook created? Did you start with an existing workbook? If
yes, you may want to go back to that file and fix it for future use.
If it was File|New, you may want to see if the author has a book.xlt (in their
XLStart folder). Maybe that template workbook is missing the Currency style.
(It doesn't sound like it came from this pc, though. If you fixed it by
starting a new workbook, then that book.xlt (if it exists) has that style.)