Win8.1 system pops up the Windows update window prompts "Windows upgrade is available for installation" solution

The Win8.1 system suddenly pops up the Windows Update window, prompting that “Windows upgrade is available for installation. Please save your work and keep the computer powered on and on. The upgrade can take some time, but we will notify you when the upgrade is completed. The specific phenomenon is as follows:

1. Through the test, this is the upgrade push of Windows10. If you click to start the upgrade immediately, Then your system will be upgraded to Win10 system, if you want to operate it depends on whether you want to upgrade to windows10, if you don't want to upgrade, please close it or plan to execute it later.
2, Microsoft's promotion of win10 is more and more frequent! However, Win10 is quite mature at present, users may wish to try it out, the upgrade will not cause file loss.
The above is the introduction of Win8.1 Windows pop-up window prompts "Windows upgrade has been available for installation" solution, after knowing the reason, we can easily solve the problem.