forcefield.exe is a ForceField.exe belonging to ZoneAlarm ForceField from Check Point Software Technologies.
Forcefield.exe is a Windows file created by Check Point Software Technologies. The file is usually found in Program Files\checkpoint\zaforcefield folder.
If you find it anywhere else, please note that forcefield.exe could be a virus, trojan, worm, or spyware. It is thus recommended to scan your computer with an antivirus software to make sure it is not infected.