❓ Weird ass computer virus

I recently was trying to acquire Sony Vegas Pro through illegitimate methods. I came across what I believed to be a trustworthy source and began the download. When I started the installation a couple of random windows popped up with loading bars. This of course raised many red flags and I stopped immediately. With just a glance I saw that it had made itself a admin, disabled user control, and disabled all antivirus(Windows firewall, AVG, and ccleaner).This is what happens when I open up windows defender. The virus has also blocked any webpage that has to do with virus support or anti malware software; when i try to access such sight one of 2 things pop up:
or ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓ ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
It also periodically plays audio only adds and when it plays them it blocks volume mixer so i can't see which program is making the ad. What the hell do I do!?!?!?!? I am only asking on this forum because I am active here and Microsoft and other forums that help people with viruses have that "internal server error".

Reset your pc.

Sounds real nasty, probably ran a booby trapped executable which turned out to be a trojan. Personally I've never come across anything like this but the first thing I would do is try to run Malwarebytes Anti-Malware. Depending on how aggressive whatever you have is you may not be able to run it. Best thing to do would be to grab Chameleon which is designed to force MBAM to be installed:

https://www.malwarebytes.org/chameleon/

I wonder why you got a virus , restore to a back up date not your whole computer.

Just reinstall your Windows , its simple.