I got a nasty virus which disabled my firewall and wouldn't allow me to turn it on. It also disabled Windows Defender, so I couldn't dick about it. Then I got rid of the virus, but gave me a blue screen of death as a result. I new how to fix it by going into the registry, but my Base Filtering Engine folder was completely missing, so I couldn't fix it. To be clear, Windows Firewall was not in my services list, so I couldn't do anything.
So I had to painfully reformat my computer. Right now, I'm miserably reinstalling all the shit I lost. Gaaaah