OK I ran your appremover : All it found was MBAM-- so I removed it, just to be sure.
I then went back to my account and re-downloaded the ZA installer app.
Then I used Revo Uninstaller to completely remove all traces of ZA, plus I ran a registry cleaner.
Reinstalled ZA from the fresh installer.
....and IT WORKED !!!
I really doubt it was MBAM-- but it's free, anyway.
I believe the installer app was perhaps corrupted during the 1st download. Should have tried that first-- but live & learn...
You may close the thread --if you wish, and thank you !