I have Windows XP1 Home and Mozilla Thunderbird on Broadband. For a long time now when I launch Thunderbird and click GET MAIL a window come on with the heading: ALERT! "This folder is being processed. Please wait until processing is complete to get messages"
Nothing is being processed and the Windows Task Manager confirms no activity. I therefore would be in for an endless wait. However if I click the X to close the message window and then click on GET MAIL it may allow it or the message may return. Sometimes a single closure works, sometimes a dozen closures WORK but today it always returns and I cannot get past it.
I have run my Kaspersky Internet Security V7 (UPDATED daily) regularly but it reports no PROBLEMS or threats.
I have to assume this is malware of some sort. How can I get rid of it? Has anyone seen this message before?
Any advice would be welcome.
Jimbos. What is Windows XP1? Do you mean XP SP1? If so why are you not running at least XP SP2?

Personally I would turn off email scanning in your antivirus. It's over kill as anything malicious will be caught by the AV anyway. Plus it seems to be giving you problems.There is a good chance, Thunderbird is compacting your mail. That process shouldn't be interrupted, or you may lose your mail.
Let it finish.