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Outlook 365 w/ Windows 10 Pro crashes; repair and reinstall don't fix
Outlook 365 became unstable a few days ago and now is completely whacked. Our 365 subscription is in my name, but I share it with my wife and Outlook 365 usually runs on her Dell machine under her Microsoft account.
1. When run under her account, it either crashes right after opening, asking me to send the error report, or tells me "There was a problem checking this device's license status, please sign in ..." and then crashes, or tells me I'm missing a dll file (the file name changes from instance to instance, I think) and then crashes, or some combination of the above. But it always crashes.
2. When I try to open it under my Microsoft account on her Dell, I get a different error message, and then it crashes. It tells me there's a problem and Microsoft will tell me when there's a fix. (I'm paraphrasing.)
2. I tried "Change" and ran the "Quick Fix", but it didn't help. Then I ran "Online Repair"; it said it was installing the 365 suite but hung up and never completed. I tried this several times.
3. Then I uninstalled 365 and reinstalled it. The uninstall and install went smoothly. But even this didn't fix the problem.
The other Office 365 programs are running fine and there are no apparent problems anywhere else.
The last update on the machine is "Update for Windows 10 Version 1607 for x64-based Systems (KB3150513)" on March 16. The OS is Win 10 Pro 64 bit.
Any help would be enormously appreciated.
Rick