My Outlook Express has suddenly refused to block senders. On attempting to do so the message "do you wish to delete messages from this sender ?" comes up but the process then stalls halfway through the "green bars" procedure and the machine is locked. The only acceptable action is to close OE and re-open it. I also have three emails in the Inbox which I can neither remove nor read - on highlighting any of them the machine locks again. I don't know whether ity is significant but all three are on the same date.
OE has been working perfectly well for a long time and I have made no alterations to any settings.