VSMon.exe (Zone Labs) This actually displays as True Vector in the Task List in Windows 95/98/ME, and as VSMON in Windows NT4/2000/XP. Essential component of the Zone Alarm Internet firewall software. It is started via the registry in Windows 9x/ME, and as a service in NT/2000/XP. This program enforces the security rules which you configured on the Zone Alarm screens. Recommendation : Essential to the proper running of Zone Alarm; leave well alone.