Salut,
Si tu as une carte graphique AMD, essaye ceci:
1) Download the install AMD Radeon Windows 10 ( support.amd.com/en-us/download ) drivers that were released couple of days ago. Ver 15.7.1 I believe.
2) After installing rebooting, go to regedit. In regedit, go to the Find option in the Edit Menu.
3) Search for EnableULPS. Double click on it and change the value from 1 to 0.
4) Exit regedit and restart your laptop.
5) Your boot and sleep times should be much, much better
Source: https://h30478.www3.hp.com/t5/Ordinateurs-portables-Systèmes-d-exploitation-Démarrage-et/windows-10-boot-lent-démarrage/m-p/582030#M86847
Ça m'a déjà servi