It is very likely that roiim.exe is spyware, adware, or a virus of some type. Backup your system and delete this file, or perform a free scan of your system to be certain.

roiim and it's associated process, Adware.W32.TargetSaver, are known to be a type of malware. Malware and adware often masquerade as essential files, so backing up your system before deleting files is a very good idea.

A good way to ensure that you only remove rogue files is to use Computer Associates's free scan of your system.

Since roiim.exe has been found on your system, there is a good chance that there are different kinds of adware lurking. This free system scan is probably the best way to make sure you don't experience future issues with rogue files.