Merci beaucoup, Hervé!
Laptop now runs much faster! Videos on YouTube does not lag, the interface also has become much smoother.
But there was a problem with hibernation. If you turn it on from the context menu or close the cover, the power LEDs shines constantly, the computer responds only to grip the power button for 8 seconds. But if you leave your computer on and it will automatically go into sleep mode, then everything works fine, LEDs blinking power, turns off the hard drive, fans ... wakes up almost immediately.
Again, please help!