Unfortunately your image doesn't clarify the problem. If there is a conflict, remove one element of the conflict, no conflict, but it doesn't pinpoint the culprit. Are you sure that Windows Defender isn't still active on win7, I don't know if that is disabled automatically when a 3rd party antivirus is installed ?
I also didn't use win7 for very long (early win7 starter edition on a 10.1" netbook), preferring to keep my old XP Pro desktop going until I got my new win10 laptop. So I have little practical experience of win7.
Windows Update as a site could quite well be using the latest secure transport functions QUIC/HTTP3, but simply having that function enabled in avast could have some impact.
I don't even know what version of MS Edge (I have never used it) you would be able to install on win7 SP1. Probably the older version and not the latest chromium based version of ms-edge.