In short, it's likely to be the combo of Norton or maybe a memory manager you installed but did not list.
My hard disk has started thrashing whenever Outlook 2003 has been running on idle for a few minutes. If I close Outlook 2003 the disk stops thrashing altogether.
I tried a programme called 'FileMon' and the results window kept repeating the line "OUTLOOK.EXE:2144" as soon as the thrashing started.
The machine is running Windows 2000 Pro with Service Pack 4. It has 1.5Gb of RAM and the hard drive is a 123Gb IBM. CPU is an AMD 2600.
I've got Norton SystemWorks Premier 2006 and Norton Personal Firewall 2005. I've tried a full system virus scan and found nothing. I've also tried various spyware programmes and again found nothing suspicious.
Can anyone help me?