Re: Tried Avira...
Who hasn't???
Think I tried them all at one time or another AVG, Avast, Avira*- when they became a pain and more trouble than they're worth, swap to another one.
Now, I just use the MS built in one, with the occasional scan with Malwarebytes for a second opinion.
*not necessarily in that order - and probably played about with other software with names NOT starting with "AV"