How to Install QuickBooks Desktop for Windows & MAC?
https://quickbookhelpdesk.com/blog/complete-quickbooks-installation-checklist/
Moving QuickBooks to a new computer is a common task when upgrading your device or replacing an older system. While the process may seem challenging at first, restoring QuickBooks correctly ensures that your company files, financial records, customer information, and payroll data remain available without losing important business information. A successful transfer involves installing QuickBooks on the new computer, restoring your company file from a backup, and confirming that everything works as expected. If any step is missed, you may experience issues such as missing company files, login problems, or errors when opening your data.