I am running Windows 8 and am using Windows Live Mail. As of this morning I can't delete any emails any more. I can open and read incoming emails but even then the blue subject heading doesn't turn gray any more (indicating that I've read the email). The delete icon doesn't work at all. I've done a reboot. I've tried fixing/repairing the program through my Control Panel - no change.

Every thing else seems to be working fine - sending and forwarding is okay.

Any suggestions?