It is highly recommended to install Service Pack 6 (SP6) after the main installation to fix bugs and improve stability on modern hardware.
: If you have old 99 SE files but want to use modern tools, Altium Designer (formerly DXP) can convert 99 SE database files into modern project formats. Resources for New Users download protel 99se
: If you are running Windows 10 or 11, you will likely need to run the installer in Compatibility Mode for Windows XP (Service Pack 3). It is highly recommended to install Service Pack