I did a Ledger 9.2A update at a client earlier today, and I kept getting into some kind of problem.
We finally got it working nicely, by logging onto the workstation as the Admin user.
This was necessary, even though the user that I was logged in the first time supposedly had Admin privileges.
Did you do your install as the Administrator, with full privileges?
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Samuel Kopstick
S Kopstick & Associates Inc
Toronto, ON