dot net framework won't install

I'm putting together a new build, sort of a Frankenstein with some new parts and many old that I had laying around. I have linux on an nvme that windows can't see, dual booting with windows 7 through grub on the nvme. That all works fine. Finally got USB drivers installed (not so easy with no mouse) but I got it done.
In the process of installing some software it seems I need more than .net 4. Trying to run the stand alone installer for .net 4.8, I get this error ...

Final Result: Installation failed with error code: (0x800B0109), "A certificate chain processed,
"A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider"

Mobo is Asus Prime B450M Aii ... CPU Ryzen5 1400 ... Video GeForce GT 710 ... W7 is on a Samsung 870 EVO 500G. I don't know what other info you neeed. How do I get this .net framework installed. I have other Windows 7 builds that I don't recall having this problem with.

Try this one
.NET Framework 4.8 for Windows Server 2008 R2 for x64 (KB5046258)



- - - Updated - - -

You can also try this
https://go.microsoft.com/fwlink/?LinkId=2085155

4.8 requires KB4474419 installed.

Thanks guys, I did finally get this to work. Maybe this will help someone else. First I installed 4.5.2. I thought I had tried it and it failed but maybe I only thought I had tried it. Easy to get confused about what I've already tried sometimes. Anyway, 4.5.2 worked. Then I tried 4.6, no go. I had to install a trusted certificate. Then it worked. Then I tried 4.7.1, no go. Another certificate was needed. Then 4.7.1 worked. After that 4.8 worked.
I think I had to go in sequence with the major revisions (4.5, 4.6, 4.7, then 4.8) then add certificates as needed. Anyway that's what I did to get it installed.
Thanks for helping, I'm sure I'll need you again

1
.NET Framework 4.8 Standalone Installer will not install.

If need to activate, to add new apps, to upgrade net4.8, , ,
you have to update hotfixes first.

2
Update your Win 7 installation media

Minimum five hotfixes (to be ok to activate, to upgrade net4.8, , ,)

1. kb4474419-v3
2. kb4490628
3. kb4538483
4. kb4575903
5. kb5011649

After install the first two, have to re-start computer to continue next three. Otherwise, error/red warning on screen during my PC install.