A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
A quick workaround. Instead of going through "File --> Save As", just hit the F12 button on the keyboard. This bypasses the Office interface and puts you straight in a standard Windows dialog box at the current working folder. No rolling back software, playing with services, registry hacks required.
I found this workaround somewhere on Stack Exchange. I wish I could remember where.