After installing NIC in addition to an antivirus solution from another vendor, your computer freezes completely and you get lots of error messages.

Different Antivirus products may "quarrel", as they often want to scan the same files at the same time. This may cause your PC to show some unpredicted and unwanted behaviour

Recommendation: You should uninstall other antivirus software before installing NIC.

If you experience this problem on Windows 98, XP, Me or 2000 you may have to start your computer in safe mode to be able to uninstall one of the conflicting Antivirus products. To start the computer in safe mode, press F8 during boot, before Windows starts loading.