I can find it either - do a search of your disk and right click on it and read the properties - this may give you an idea who it belongs to - if unknown change its name until you can find out anymore ie rename regiimon.old - also look in msconfig and disable anything in the startup and services folder.
Check for viruses and spyware - if you can use your virus program try this online scanner
You can get a good free spyware program call adaware from here
Tell us more about your problem ie when it started and so on... maybe we can help more