Windows 10 Blue Screen after update/rollback

Thanks for the replies.  I tried recovering from a previous Acronis backup but it failed, leaving my OS unbootable, so I ended up reinstalling Windows fresh yesterday.  

The machine is still crashing overnight so I went on with your memory advice.

I have run memtest86 from a bootable usb I made.  I think there were 10 tests, 1-3 no errors, but hundreds or thousands of errors for the rest of the tests.  

So does this mean it is for sure a stick of bad ram?  It could be the motherboard also I know, but any other possibilities?

And does memtest86 have the ability to show which ram stick is bad? (or if its the mobo?) Or is it just a process of elimination by taking out one stick at a time?

Thanks for the help.

I couldn't find a way to determine from software which stick was bad, so I started pulling them out one by one (had four sticks).  Of course I found it to be the very last stick I tried, but I found the problem!!!  Feeling lucky it wasn't a bad CPU or motherboard.  I did try to reseat the bad module in case it just wasn't set right, but it still had errors.

Thanks so much for the help.

I couldn't find a way to determine from software which stick was bad, so I started pulling them out one by one (had four sticks).  Of course I found it to be the very last stick I tried, but I found the problem!!!  Feeling lucky it wasn't a bad CPU or motherboard.  I did try to reseat the bad module in case it just wasn't set right, but it still had errors.

Thanks so much for the help.

You are very welcome and I was happy to help