Sound good. Upgrading your system, if successful, should have the same repair effect as an in-place upgrade repair install.

Thank you for your reply.

Have you ever disabled Windows Update?

Please follow last suggestion. Tutorial available if needed. Keeps all progs and data.
You will need an iso of the same build...

Good SFC now passes. However service states may be incorrect or there may be other corruption.

If the troubleshooter fixes something and passes, obviously try again; if not, you can try
Reset...

Welcome to tenforums. I suggest you need to start with some basic checks.

1. Check your disk. Try
Hard Disk Sentinel (trial) - the best instant text report I know. Else e.g. HD Tune - Health and...