Hi folks.
I've attempted to copy an email address to the clipboard then paste it
directly into a cell within Excel.
For some reason today Excel starts to hang.
I've confirmed with the clipboard viewer that it's only the email address
exists.
It works fine from Notepad or if I paste directly into the formular cell.
But as soon as I paste it direcly into a cell like A1, then Excel hangs.
I've tried doing a repair to no avail.
I've looked in the Event logs:
There is an entry prior to the Hang that may give somone an idea:

Root\MSAPPS10, but did not specify the HostingModel property. This provider
will be run using the LocalSystem account. This account is privileged and
the provider may cause a security violation if it does not correctly
impersonate user requests. Ensure that provider has been reviewed for
security behavior and update the HostingModel property of the provider
registration to an account with the least privileges possible for the
required functionality.

Any ideas.