How to revert to win 10?

My computer keeps on trying to go to 25H2, but blue screens on restart.  I tried to update to 25H2 in FLYOOBE, but it does the same thing.  Every time I restart I have to use a USB key and revert to a prior good date. PITA.

I just want to go back to win 10 for now.  Tried in settings but it says win 10 files not available.

Any ideas?

Thanks,
John