Laptop suddenly log on super slow?

Have short my laptop while the battery has already warned normal runtergefahren.Nun he is at as synonymous log out has become totally slow.

What could have happened? How can I get it faster again?

Of course I have recharged the battery now.

Presumably, it depends on power-saving mode. Once a reset of the bios make or look after starting in Windows under Energieeistellung.