How can I prevent Windows 8.1 upgrading to Windows 10? [duplicate]
Solution 1:
With the later updates to Windows 7 and 8.1 relating to the "Get Windows 10" (GwX) notification system there was also support for disabling the notifications.
Microsoft KB3080351 describes the somewhat finicky steps to do this (involves registry changes or Group Policy Editor).
Subkey: HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
DWORD value: DisableOSUpgrade = 1Subkey: HKLM\Software\Policies\Microsoft\Windows\Gwx
DWORD value: DisableGwx = 1
There is also a third-party tool Never10 which automates the process described in the above KB article.
Solution 2:
You can use GWX control panel to disable the nags
From the linked site "GWX Control Panel is the easiest way for users of Windows 7 and Windows 8.1 to protect their computers from Windows 10. With GWX Control Panel you can: Remove the "Get Windows 10" icon that appears in your notification area, prevent your Windows Update control panel from upgrading your computer to Windows 10, prevent your computer from secretly downloading Windows 10 installation files, detect and remove the hidden Windows 10 installation files if they're already on your PC, optionally monitor your computer for unwanted Windows 10-related settings and files- and beginning with version 1.7 you can now easily delete some hard-to-remove program files that are known to cause Windows 10 upgrades and annoyances."