Aw: Constant synchronising game after reinstalling Win 15 Years ago
Do you have some kind of dynamic overclocking or dynamic clocking of the CPU active? That causes probably the problem.
In most cases there is an option in the bios to deactivate this. A few mainboards also have additional software which changes the cpu-clock right from windows. You need to deavticate the dynamic clocking, otherwise you will always have this syncing-probs etc.