Download updates for Windows 7 Ultimate in a virtual machine.
Download updates for Windows 7 Ultimate in a virtual machine.
You're currently using Linux with a virtual machine running Windows 7 Ultimate. Since you don’t want Windows 10, focus on updating only Windows 7. Avoid installing any updates that would upgrade to Windows 10. Keep your setup stable for now while planning future virtualization steps.
KB3035583 is the option that installs the unwanted "Get Windows 10" feature on your computer. Avoid it, and you'll be fine.