Avast is crashing my internet

[Craig184]

My internet access has been dropping for about a month now, without rhyme or reason.  It's been happening on both my desktop and laptop but my ipad/iphone work fine. When it happens, it will happen at different times on both the laptop and desktop so I know it's not tied to the router.  I also tried the ping test and it's always my access to my router, which is still working fine when I look at the lights. 
I assume that it had to be either a Windows update or Avast but I surmise it is Avast that keeps crashing my internet.  Just now, I couldn't even connect to the internet unless it was turned off.  If I turn it off, I have no problems.

If I start downloading a large file or torrenting, it will almost immediately crash.

Avast FREE program version 19.7.2388 (build 19.7.4674.520)
Virus definitions 190821-4
Windows 10 Home 64 bit - last update version 1903

Submitted file through Avast support - ID #S3ILM

[Pondus]

have you tried avast repair and reboot?

[Craig184]

Yes

[Pondus]

And any previous used AV is removed according to vendors instructions / removal tool ?

https://support.avast.com/en-eu/article/Uninstall-other-antivirus

[Craig184]

And any previous used AV is removed according to vendors instructions / removal tool ?

https://support.avast.com/en-eu/article/Uninstall-other-antivirus

I've only ever used Avast.  Been using it for years.

[Craig184]

How long does it usually take to get a response from support?

[bob3160]

Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A

[Craig184]

Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A

And you're sure that will work?

[bob3160]

Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A

And you're sure that will work?

If there aren't any remains from prior AV's, it would be the next thing I'd be doing if that was my computer.