First of all, the critical update is KB3035583. If it's installed itself so that icon for installing the upgrade appears on your task bar, get rid of it by doing the following:1. Click on the Start (bottom left corner of screen) and then on Control Panel
2. In the next window, click on Programs (or Programs and Features if that's what its called on your set-up)
3. In the left-hand panel of the next window, click on View Installed Updates
4. Wait until the list populates (marked by the progress of the green bar across the top), and then locate the update of number above. (You can use the Search function at the top right if necessary.)
5. Click on that update to select it, and then click on Uninstall, above the right-hand panel
After you've uninstalled it (you'll have to reboot to complete the job), the update will eventually (probably the following day) be re-sent to your computer. What you do then is:-
6. Click on the Start button, and then click on Windows Update
7. If the update is there waiting to be installed, there will be a little box on the left with a tick in it. Just untick the box. Don't delete the update, just leave it there.
I did this yesterday, and the icon calling on me to install Windows 10 did not reappear this morning. Whether it will reappear later when I reboot to install other updates, I don't know.
