Microsoft has chosen to restrict backwards compatibility starting with its release of Windows 7. Gradebook Plus Windows Edition v8.1 is one of the many programs affected. This problem affects software written to Microsoft specifications to be compatible to all older versions of Window including Windows 95, Windows NT, Windows 98, Windows me, Windows 2000, Windows XP, and Windows Vista.
Here is what we know as of 01/11/2016. We will update this web page as we learn more.
There are many users upset with Microsoft for the decision not to offer backwards compatibility with the standard version of Windows 8. This decision is extremely unlikely to ever change.
Windows 8 Professional Edition
Microsoft provides backwards compatibility to allow users to run older programs by using a Windows 8 Pro feature called Hyper-V. According to Microsoft, users should be able to successfully run Gradebook Plus Windows Edition v8.1 using this technique. Hyper-V enables users to set up a "virtual machine" on their computer that acts as if it was running Windows XP.
To set up this virtual machine, it is necessary to have a Windows XP installation CD. If you don't already have one, they may be found on ebay or Craigslist for $25 or less (make sure that it comes with the installation code). Enabling Hyper-V and setting up a "virtual machine" may require the assistance of your tech support person. The two articles that explain the procedure can be found at http://www.techrepublic.com/blog/window-on-windows/create-a-test-machine-in-windows-8-client-hyper-v/6690.and http://www.techrepublic.com/blog/window-on-windows/install-windows-xp-in-windows-8-client-hyper-v/6732.