*** Beware of Possible Non-Revertible Upgrade to Windows 10 operating system ***
Read on the Web as much as you can about Microsoft's KB3035583 update.
This is what some people say on
If you simply do not want to have Windows 10 or it is not compatible with some of your
hardware and software then just revert back to your previous operating system.
Be aware there is one caveat to this process and that is you must do it within 30 days
of upgrading to Windows 10 or the capability will be gone because your old Windows
installation related files will be automatically removed from the upgraded system