They said they were from Windows.  Got me to type in some info on my keyboard to find out if my PC was being hacked.  Very critical, they said.  I said I need to authorize who they were.  He got his supervisor.  At that point I said I did not want to continue with them, but "good luck".

I just received a call from this number saying they were from Microsoft technical support with a critical call about my computer. Avast had JUST finished cleaning up issues on my computer so I was highly suspicious and asked questions until the person hung up. The woman had a strong African accent.

Just received call from 872 345 6789
Said my computer was being hacked!
How do we stop these calls!

Most of these calls are coming from India and Pakistan. Not much you can do to stop them short of looking into a call blocking device or phone.  Consider getting a call blocking device or phone.. You can google them and many are around $40.00 or so. If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.

Yes, sat there arguing with this guy. lol