.Net Framework problem. Can't update or install

iko22, no apology necessary.
I appreciate everyone's generous, patient help

After I posted I figured it out and ran it properly.

I had run sfc /scannow now a little earlier today.
I learned that I should also run it at an elevated command prompt.

Her is the log


=================================
Checking System Update Readiness.
Binary Version 6.1.7601.22471
Package Version 26.0
2019-01-29 12:36

Checking Windows Servicing Packages

Checking Package Manifests and Catalogs

Checking Package Watchlist

Checking Component Watchlist

Checking Packages

Checking Component Store
(f) CSI C Mark Deployment Not Marked 0x00000000 c!avast.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_59c2da0f1885c40e amd64_avast.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_none_59c2da0f1885c40e
(f) CSI C Mark Deployment Not Marked 0x00000000 c!policy.14.0..t.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_519156f4ce47da7b amd64_policy.14.0.avast.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_none_519156f4ce47da7b
(f) CSI C Mark Deployment Not Marked 0x00000000 c!avast.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_a17010e62d01ed14 x86_avast.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_none_a17010e62d01ed14
(f) CSI C Mark Deployment Not Marked 0x00000000 c!policy.14.0..t.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_993e8dcbe2c40381 x86_policy.14.0.avast.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_none_993e8dcbe2c40381
(f) CSI C Mark Deployment Not Marked 0x00000000 c!avast.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_a65012d829d61c47 x86_avast.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_none_a65012d829d61c47
(f) CSI C Mark Deployment Not Marked 0x00000000 c!policy.14.0..t.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_4cb15502d173ab48 amd64_policy.14.0.avast.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_none_4cb15502d173ab48
(f) CSI C Mark Deployment Not Marked 0x00000000 c!avast.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_5ea2dc011559f341 amd64_avast.vc140.mfc_fcc99ee6193ebbca_14.0.26706.0_none_5ea2dc011559f341
(f) CSI C Mark Deployment Not Marked 0x00000000 c!policy.14.0..t.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_945e8bd9e5efd44e x86_policy.14.0.avast.vc140.crt_fcc99ee6193ebbca_14.0.26706.0_none_945e8bd9e5efd44e

Summary:
Seconds executed: 2635
Found 8 errors
CSI C Mark Deployment Not Marked Total count: 8

Hi Larry,

Those errors are pretty standard, they all relate to Avast and DO NOT affect your system in any way..


Your best bet is a repair install. NO LOSS OF >>YOUR<< DATA.

Repair Install

Getting hold of a W7 SP1 ISO is not a problem.


Roy

I'll admit, it makes me nervous.

I have a lot of stuff on this computer

Hi Larry,

to be expected, back up your OS beforehand using Macrium (free)
Imaging with free Macrium

Roy

Thanks for all your help.
It may be a day or two but will report back

Just wanted to report back that the issue has FINALLY been fixed.

I had continued to look for a solution short of installing Windows again.

That made really nervous.

I stumbled on to something called Reimage.

After checking it out, I figured the second worst thing was that it wouldn't work and I'd ask for a refund.
(Worst was it would crash my computer)

I tried it and it fixed a lot of things including my .net framework problem.

I want to thank you all and appreciate all your patient help.