Welcome to the Community space, @jeyges.

Let me help you clear things out. QuickBooks 2008 is no longer supported by our system.

However, you can continue operating it on your computer. Yet, for any issues that will persist while using it, you no longer have the access to contact support. 

Regarding your Windows model, I recommend getting in touch with Microsoft contact support. To ask for insights if you can downgrade your system to make it compatible with your QuickBooks 2008 as Windows 10 and above is now supported by QBDT 2020.

For additional assistance in understanding Quickbooks system requirements, don't hesitate to reply to this post. Keep safe.