NetScream is a tool that is supposed to make your Internet connection faster. It does several registry tweaks and it modifies several configuration files in order to achieve this. All you need to do is select your operating system and the type of Internet connection that you have. 
I tested this program on my computer, but I couldn’t find any visible improvement in my connection speed. I was always able to download data from the Internet at the speed specified by my ISP. The publisher states that the optimization only works in 80% of the cases. I guess I was in the 20% that remain.
When I clicked the “GO” button in order to optimize my connection, the program asked me to restart my computer. In fact, each time I tried to optimize my connection the program asked me for a restart. You don’t have to run NetScream more than once. I just did this to test the program.