Something odd is happening with Outlook!
After doing my mail, I close

Outlook, and go on to something else, but computer is very slow.
Do a 'Cntrl/Alt/Del' to look at 'Windows Task Manager'.
'Outlook' has vanished from the 'Applications' tab, but it moves to the 'Processes' tab and it is using 99% of CPU resources.
It just keeps running indefinitely at this level until I end the 'Process'.
This has happened several times.

Ran antivirus, Ad-Aware, Spybot and Registry Mechanic and didn't find anything.
I closed the connection with the internet, but that didn't affect the CPU usage.

Has Outlook been infected by malware?
Is ZA Mailbuddy addin causing a problem?
How to find out?
How to fix? Where to go to find out?

I'm running WinXP Pro with Office XP.

Could use some help.

Operating System:Windows XP Pro
Product Name:ZoneAlarm Internet Security Suite
Software Version:6.5