Your problem is your processor is too fast for older software. If you are
running DOS try the program SLOWDOWN. You can chose what % your processor
speed will run at to match this and any software.
Another alternative is to get patching software that will rewrite the game
.exe to eliminate this problem, in which case slow down twill not be
necessary. However, patching software does not always work, so be sure to
save an original copy of Quake.exe in case the copy you patch get corrupted.
I don't have the patch programs names right here, but I will post their
names within the next few games.
In the mean time links to SLOWDOWN and similar software may be found at:
http://www.chebucto.ca/~ak621/DOS/Websites.html
Cheers,
Colin