Hi ticolico
mstask.exe is the task scheduler and according my experience it's not important for the good working of NAV to give it internet access.About your other question GHPWin32 (svchost.exe) is essential for the good performance of your computer and you should give it access to internet in both trusted and internet zones and server rights but only in trusted zone. Deny server internet rights (three green ticks and a red cross under server internet).I don't know what version of ZA you use (it's free you say and I assume it's version 6.1)but if you have the smart adviser enabled it will configure automaticaly as said before.However if it's different do your self manually with no problems.