I have over 10,000 emails in my inbox that I want to delete.

I tried CtrA, which highlighted them, but when I clicked the red X delete it came up with "an unknown error has occurred"

So I tried deleting a page of emails with Shift click - this worked once or twice, then I got the "Unknown error" message again.

So I tried deleting one at a time - again, at first success, then the error message.

Now sometimes I can delete a group, sometimes not, but always end up with the error.  It will take forever to delete all those emails!

Have tried repairing Windows Essentials, but this did not work.

Any ideas?