I'm sure there are no other options.
I don't have the receipt because my friend threw it away, so I can't take it back.
They're not DOS games, they're definitely for Windows, and it says it's compatible with 95, 98, and XP (but not 2k, strangely).
Compatibility options don't help.
A screenshot wouldn't be much use I don't think, because it would just show one frame,and the problem is that it's showing about 15 frames in the time it should show one.
Normally I complain about low fps, now it's the other way round...
Anyway, thanks for the replies.
If I can't solve it, I think I'll just sell it at a car boot or throw it away, it was only a few quid anyway.