I have just installed a new master hard drive in my computer, and am attempting to install my copy of Microsoft Office 2003 Professional. Unfortunately, I've lost the serial number - no, really.

I still have Office installed on the slave (used to be master) drive, and I'm wondering if there's any way to figure out what the serial number is in the installed copy.

Try going to www.belarc.com/download.htm and run the advisor (from the old PC). Should list the product key. Otherwise contact Microsoft.