Hi,
on Saturday 8th July 2017 I updated my Norton Internet security. There were 50 updates to be applied. It took a while. At the end it asked for a password for SONAR. Which I didn't know.
Once all of the updates were applied. My Windows 10 email and calendar clients stopped. Tried to reinstall from the "Store" but it didn't fix it.
Anyone had the same issue?
Regards, John