Thanks for the logs. You’re using hardware encoding and you have different graphics cards and different graphics drivers on each system. When using hardware encoding the driver is responsible for the video encoding (not MCEBuddy, it hands the video encoding off the drivers). There in lies your issue, the fault graphics driver is creating the video issue.
There are two possible solutions
- Turn off hardware encoding in the Conversion Task → Expert Settings page
- Change your graphics driver to a more stable one (latest is not always best). See this topic for a list of recommended drivers (or use the driver from the system that’s working). GPU/Hardware Encoding/Acceleration FAQs