Matti, are you certain that you have a good cable for your computer connection to the keyboard? When I first bought the Tech Manager it came with a damaged cable that would not work. Had to have a replacement cable sent before the system would work. The Tech Manager certainly is a marginal piece of software and is not well documented, but it does work.

Scott, I just built a new computer that runs at 650mhz. The Tech Manager works fine in it. There is no reason to believe that a faster PC would have trouble with the software.