SRM uses a speed up of the internal clock to achieve real 0,001 second accurary. It makes the internal clock of the PC run up to 600 times faster. Only true DOS (MS-DOS, FreeDOS) allows this, a Windows environment does not allow a program to speed up the clock. Windows detects the speed up and immediately corrects the clock speed, resulting in SRM locking up or problems with timing. If you want to run SRM from a Windows machine, you must boot it in DOS first.

Also check the scanning frequency settings, found in the Settings screen. When using the SRM and it's timing routine in Windows, you must select "18 hz" for the program not to crash or cause an error when starting the timing. However, timing will not be accurate this way! This is only for non-timing purposes, to try out the program under Windows.