Les différentes versions de Windows

>> point de restauration et dernière bonne configuration

voir aussi : https://leclaudemvp.wordpress.com/w-8-w-10-en-sans-chec/

et http://christians-steffen.fr/activer-la-touche-f8-au-demarrage-de-windows-8-1/

Vérifier si l’utilitaire de récupération est présent

you can examine with command reagentc /info the current state of recovery environment settings.

Open a command prompt with administrative privileges.
Type command reagentc /disable and execute.
Type command reagentc /enable and execute. (Eventually reboot if the command reports an error and try again.)

Windows RE may also be accessed manually if it’s installed to a local hard disk. The method used depends on the version of Windows:

Windows Vista / Windows 7
Press and hold the F8 key* early in the system boot process. Then select the Repair your computer option from the boot menu that appears.

Windows 8.x
Press WinKey+I and click the Power icon. Hold down Shift and click Restart. Click Troubleshooting and then Advanced options to bring up the repair options.

Windows 8.1/10
Press WinKey+X to open the Quick Link menu. Click Shut down or sign out, then hold down Shift and click Restart. (In Windows 10 you can also open the Start menu, click on Power and then Shift-click Restart.) Click Troubleshooting and then Advanced options to bring up the repair options.