David wrote

Oops. Sorry.

I remembered reading the comment, but I didn't remember who wrote it.

Referring to OP's statement:

to the point that you can't close Excel without having a floppy in the
drive.

That doesn't match my experience. While my drive was polled until I
overwrote the MRU, it only occurred when Excel was first opened, not
continuously and I could still close Excel.

I guess what I'm saying is that the MRU may not be the OP's issue.

--
David