When installing PF3 for the first time and you are using the above security software then you need to do the following to avoid errors.
1.Open Norton Security and click on Settings icon.
2.Next click on Antivirus.
3.On the Automatic Protection turn OFF the following for the duration:
Auto Protect
SONAR Protection
SONAR Advanced Mode
Firewall.
4.Now click on tab: Scans And Risks and scroll down to "Items to Exclude from Scans" click configure and look for PF3 Folder or C:/FS_Addons add and save.
5.Do the same for Auto Protect Script Control, SONAR and Download intelligence Detection as above
6.Once PF3 is installed and keycode entered and it's all up and running, then turn back on..
Auto Protect
SONAR Protection
SONAR Advanced Mode
Firewall.
Hope this is helps.