About 3 weeks ago I broke Windows. I was trying to manually remove a trojan since I couldn’t find a program to remove it. Adware/Spyware removal programs and my virus scan program couldn’t fix it. I thought I had backed up the registry, obviously I didn’t.
Took me 3 weeks to stop procrastinating and get my system up and running. After windows was reinstalled, it took me 9 hours to get Windows where I wanted it. I hope to never need to do that again.