Msimn.exe
(Microsoft)
This is the Microsoft Outlook Express 5/6 program. Technically this is not a background task, and it should therefore not be listed on this page. However, as we regularly receive reports of MSIMN showing up in the Task List even after Outlook Express has been closed down, we thought we would list it anyway.
Recommendation :
If you end up with MSIMN showing up in the Task Bar even after you have closed Outlook Express (sometimes you may even have more than one instance), then the problem may be caused by the McAfee antivirus software. If you do have McAfee, then go to the McAfee website to download all software updates (as opposed to virus updates) for your version of McAfee VirusScan.