If your PC runs Windows 7, Microsoft may send you notifications to upgrade to Windows 10. In case you do not want to upgrade and want to get rid of the notifications, you can follow these steps:
- Uninstall Update for Windows KB3035583
- Delete the GWX Program
the GWX process has to be stopped and the program removed. It’s located in C:\Windows\System32\GWX and C:\Windows\SysWOW64\GWX in 64 bit systems. Delete the entire GWX folder.