Does InstantTrack run under Windows XP?
Yes. Windows XP is very similar to Windows NT and Windows 2000, so all the comments in the question above about Windows NT also apply to Windows XP. When Windows XP minimizes a DOS program like InstantTrack, the real time clock value seen by that program is frozen. When InstantTrack is reactivated, its notion of real time will be out of sync. XP will then speed up the real time clock until, eventually, InstantTrack is back in sync with reality. I’m sure this funny trick enhances compatibility with some programs, but it’s not very helpful for a satellite tracking program! There is probably a way to turn off this feature of XP. If not, you should just avoid allowing InstantTrack to be minimized.