How do I switch off the Simple File Sharing feature of Windows XP when installing the PC or Server version of OPTAC3?

First of all, make sure you have Administrator rights for the PC. Then click on Start > Settings > Control Panel > Folder Options > View.

Scroll through the Advanced Settings list and you will find an entry called “Use Simple File Sharing”. You must de-select this option and click Apply. Your Simple File Sharing is now off and you can continue with the installation of OPTAC3.