I've had it work fine with
Windows98 and 98SE (kinda tricky)
However, make sure you free up some IRQ's. If I remember correctly the card needs 2 of them. Go into your PC BIOS and disable your Printer/Parallel Port (IRQ7), or disable you PS/2 mouse port (IRQ12) and use a serial port for your mouse.
At the time these types of hardware based mpeg decoder cards were on the market, PC's couldn't handle the decompression of the MPEG video/audio streams. So a good hardware decoder was needed to fill in the slack. So now a days, these cards are basically useless since the processing po