Sketch works when uploaded only from a specific computer

Your topic was moved because you posted in the 'installation and troubleshooting' category. At the top of that category it says:
For problems with the Arduino IDE (integrated development environment). NOT for problems with your project.

I don't think you have a problem with the IDE and I don't think you think you have a problem with the IDE.

You might reasonably complain that the title of that category is not as clear as it might be. We know.