Allow me to dive into this thread concerning QuickBooks Desktop (QBDT) compatibility requirements, @DLCFencing.

My colleague, MarkAngeloG, is correct about the inability of QBDT 2021 to operate on Windows 11. The mentioned version of the application only operates on the following Windows servers:

• Windows 10, all editions including 64-bit, natively installed
• Windows 8.1, all editions including 64-bit, natively installed
• Windows Server 2019, Standard and Essentials
• Windows Server 2016, Standard and Essentials

If you currently have Windows 11, you may also consider upgrading to higher versions of QBDT, as QuickBooks Desktop 2021 software will be discontinued by May 31, 2024. To upgrade, you can refer to this article for complete guidelines:  Upgrade QuickBooks Desktop Pro Plus, Premier Plus, or Enterprise.

Let me know if you have additional questions about system requirements or the compatibility of the application. The Community always has your back. Take care!