This can be caused by a Windows update breaking certain compression settings.
In Zu3D, try changing it by going to 'Settings' > 'Camera Settings' and then clicking the 'advanced' tab at the bottom. Change the compression dropdown to something other than MJPG. Try YUY2 (if that's an option), or, if that's not an option, please just try changing it to something different from what it is on at the moment.
If you are still having problems, please contact us and we will investigate further to help try and work out what the root cause of the problem is for you.