First of all, antivirus can't help that much with this one.
You have to isolate where the virus is.
Download Malwarebytes, it'll find where the virus is, but it won't delete it. Go to the file and delete it manually.
If it says the directory is non-existent, go to run and type %[name of the directory, not the path here]%
If it says you can't delete it because it's attached to a service, disable the service from start-up, restart, and then try and delete it.
My brother had this problem a few weeks ago. : P
By the way, we tried every other possible solution, it didn't work for us.
We had to basically feel around in the dark until we isolated it, so this might not be the exact way to fix it for you.