Avira's rescue disks might help. Burn it on another computer, drop it in, and boot from CD.
On a couple machines that Malware just refused to run and/or finish, Avira was good enough to get rid of enough initial problems that I was able to run Malware afterwards.
I no longer have it, but about 2 years ago, I ran across a forum with an added script file to help Malwarebytes run. You'd run it first and it would kill a bunch of processes for the sole purpose of running Malware next. Wish I had it. Just a little .bat file if I'm not mistaken. Maybe you'll run across it at some point.
If you get it clean, dropping $10-20 on a Malwarebytes license might be a good choice. I haven't had any problems since I started using their real time scanner along with Windows built in stuff.
Or just quit looking at internet porn.