From the developer: "Net Accelerator can improve your connection speed no matter what type of connection you are using (Dialup, DSL, LAN, Cable an so on). It's very hard to configure your connection automatically because there are a lot of different hardware vendors in the market and each computer is a little bit different than the other. After choosing your configuration, Please click on the 'Apply' button. Automatic optimization modes (Automatic #1, Automatic #2, Automatic #3): After a lot of research, Net Accelerator offers three different Automatic Optimization Modes which will improve your connection speed. You should try all three of them to find out which Automatic Optimization Mode suits your hardware configuration best. If you are unsatisfied with the three automatic optimization modes results you may try the manual mode. Manual optimization mode: Since each system is different, there aren't fixed rules. If you don't obtain satisfactory results with the Automatic Optimization Modes, you should try various setting combinations. Watch your Internet performance to find out which configuration suits your hardware configuration best."