Updated on 1/28 and restarted now my Vista won't boot

I updated, then later went to restart now it I gets to a start up screen that says I have start up issues, and that it will try to repair then it comes back unrepairable, and I couldn’t get a system restore point in the last 5 days to work either. I’m not sure what to do to this point, I have never had issues with Avast before, any thoughts from any experienced users would help greatly, wondering what I should do in safe mode, thanks in advance for any and all help

Is any file or driver referenced when you get this problem ?

Safe mode works OK ? When you try to restore what error do you get

I’m into safe mode I didn’t see any error code # or message I just finished removing avast in safe mode now I was going to try to reinstall

OK reinstall and if it fails to boot - could you take note of any warnings displayed