Looks like I'm going to buy an external hard drive after work today - That's $130 I hadn't planned on spending this week. On the bright side, I'll be able to do an xcopy from dos so I can save the data on my hard drive. The bad news is I'll need to reinstall windows and then reinstall all my programs after that. Ugh.
I guess through all this I learned a valuable lesson - when I kept getting prompted to do a backup of my drive, I would always choose the "later" option. Next time, I'll take the time to make a backup. I may not have had to do all these extra steps if I had.
Updated to add: Okay - feel a bit better. Got a T2 external drive that was on sale for $99.99. Deep sigh. Have my data backed up now. Windows is now being re-installed.