Se7en ... Now that you mention it, I have a TSR that I made many years ago called WHOA and it does indeed slow down a computer ... what do I need that for you might ask? Well... many years ago, when the speed of computer CPUs were outpacing the need for them by 5 to 1 there were many programs that when run on a speed demon of a system (for example a P100) that was designed to be operated on a 486Dx33, the thing would go so fast that you would have problem with the output, and the program was useless ... so, to make these programs work at the desired speed, we could run WHOA once, twice or 10 times (depending upon how slow we needed the system to go) and then run our nice slow program ... can you imagine intentionally telling the processor to skip every third cycle, or every other cycle ... or rather devote only 1 cycle per 10 to the current application .... lotta fun that one ... WHOA ... still cracks me up ...