OS: Windows 8.1

2012 Windows Live Mail (through Essentials)

Within last 2 days, I am unable to delete messages in Junk Mail folder.

When I try to delete, I get this message:

"An unknown error has occurred."

There is no reference as to how and what and what to do to fix.

It doesn't matter if I try to delete one email or a bunch, I simply get a"unknown error has occurred".

I'd really like some help with this problem.

Many thanks ...

Category (email topic - lost or deleted mail): not related to my issue.

I need to know how to delete mail.

Need to include none of the above or other where someone could indicate the specific issue.