TaskMgr.exe
(Microsoft)
The Windows NT4/2000/XP Task Manager. This is the very Task Manager itself, the one that you brought up to see what background tasks were running ! In Windows 95/98/ME the Task List does not show up as a separate process when you press Ctrl+Alt+Del, but in Windows NT4/2000/XP the Task List is a separate process called the Task Manager in the shape of the TASKMGR.EXE and which runs permanently.
Recommendation :
Leave alone, obviously.