...
Internet=AuthenticodeRequired
UntrustedSites=Disabled
MyComputer=Enabled
LocalInternet=Enabled
TrustedSites=Enabled
Barchart for Excel Update Errors
New versions of Barchart for Excel are periodically released to production and are automatically pushed to Excel via Microsoft’s ClickOnce technology. If you encounter issues with a Barchart for Excel update you will want to check your Windows Security and the Protection history.
...
The Protection history will display recent potential threats that were blocked. If Barchart for Excel’s files are present you will want allow Barchart for Excel’s files to auto update in the security settings.
Diagnostics and Logging
If any or all of the troubleshooting above is unsuccessful:
...