Restore to previous build.??????

I'm on Version 1607 Build 14905
Initially thought my problem was only Adobe Reader DC not opening.
Having many problems that SFC or DISM didn't fix.

"Start", "Power" does nothing, just disappears back to desktop (Right click option works)
Can't open "Windows Update" "Update History". Does same thing. nothing.
Couple of others.

Exists in Safe Mode
Ran my Bitdefender 2016, Malwarebytes, Ccleaner,

If I return to the previous build, will that just be to "14901" or does it take me back farther.
Pete

I "think" the previous version would be 1511, at least that was what it did on the one AU I have problems with. That's been an understanding issue, there are Versions and then there are Builds of the version. In my 20+ years of computing it's always been changing a Version is an Upgrade from the previous Version.

Hi Berton,
It brought me back to same version, Build 14901, which is what I was hoping for.
Fixed all the minor problems except fo Adobe Reader which crashes. I installed Foxit and that works with .pdf.

I'm on the Fast Ring so I think I'll just wait for the next build.
Thanks for your help.
Pete

I should have said I was working with the RTM version, not the Insider Preview version, probably made the difference.