Hi there, SunshineBe77829.
I'd like to verify some information. Did you copy the folder from the old computer to the new one? If so, you'll want to delete the copied folder.
Upon installing QuickBooks to the new computer, the system will automatically create new folders for the new installation. There is no need for you to move the QuickBooks folder from one computer to the other. What you need to prepare is the backup copy that you can restore to the new computer
Also, let's make sure that your QuickBooks Desktop meets the system requirements by checking it out here. When running the diagnostic tool, you'll have to close all open QuickBooks Desktop program.
If your QuickBooks Desktop did not meet the system requirements, then you will encounter some error messages. Otherwise, we can uninstall and reinstall your QuickBooks Desktop. You can download the file here: Downloads & Updates
Once downloaded, prepare the backup copy and restore it. Note: Make sure to run QuickBooks as the master admin.
I've also got these articles for reference:
Feel free to leave a comment on this thread if you have any additional questions. Thanks.