CPUKILLER is a program for slowing down your computer in able to use your older programs and games. If you are getting errors like 'runtime error', 'overflow error' and so on or if the program or game runs so fast you cannot see what is going on then mostly like it is was designed to run on the older slower machines. If you miss using those older programs and games then CPUKILLER is for you. CPUKILLER can slow down your computer up to 98%. You can create lists of programs you want to run in conjunction with CPUKILLER and use the slider control to set how much you want to slow your computer down. You can choose how long to delay before starting CPUKILLER, you can have CPUKILLER minimize or close after the program is started, you can have call it in batch files or have it call batch files, you can set the slow down percentage individually for each item on the list.