Thanks for sharing the detailed information.
As mentioned above, that you have already tried uninstalling and reinstalling acrobat. Have you also tried resetting the preferences of Acrobat?
If not, then you may refer to the help document and try the resetting the preferences of Acrobat as suggested in 2nd solution.
Let us know if it still doesn't work.
Followed suggestion in the second solution and it did not fix the problem. Latest error from the event viewer.
Faulting application name: AcroRd32.exe, version: 17.9.20044.25828, time stamp: 0x58e4302d
Faulting module name: lockpdfu.dll_unloaded, version: 220.127.116.11, time stamp: 0x57990936
Exception code: 0xc0000005
Fault offset: 0x000190f7
Faulting process id: 0x19c8
Faulting application start time: 0x01d2bb60ca40deda
Faulting application path: C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe
Faulting module path: lockpdfu.dll
Report Id: 31cf8d07-43ae-4844-987e-d20f30976b13
Faulting package full name:
Faulting package-relative application ID:
Found the problem - caused by PDF Ownerguard package.
Thanks for letting us know the exact problem.
Glad to hear that worked for you.