more help

What zc version are you using?
what is your OS?
How fast is your cpu?
fullscreen or windowed?
What quest file are you playing?
What color is you monitor?
Is this too many questions?
*NOTE*Color of monitor not required.

Try toggling your vsync in the menu options. It may also be called throttle or something like that. F1 may be a hotkey for it. See if just changing that option fixes your issue.

What zc version are you using?2.10
what is your OS?dont know want os is
How fast is your cpu?dont know but yhe other version 1.92 runs fine
fullscreen or windowed?fullscreen
What quest file are you playing?something about tortuga and isle of the winds
What color is you monitor?sometimes purple but most times normall
Is this too many questions?I dont know

Your OS is like windows 98, XP, etc.

And yeah, try messing with VSync. That's often it.

wat is VSync o and I have XP.Do uknow how to make version 1.92 fullscreen