Laptop

Laptops typically operate in two distinct power modes: battery mode and AC adapter mode. Operating systems differentiate between these modes to optimize performance—prioritizing battery conservation during portable use and unleashing full hardware potential when plugged into a power source. Normally, connecting the AC adapter triggers a switch to high-performance mode, while unplugging reverts the system to battery-saving mode. However, unstable AC power can cause rapid, unintended toggling between these modes. This often manifests as sudden system lag or freezing. ...

Most Windows laptops have a Fn key on the keyboard. It means “function”. When used in combination with the function keys on the top row of the keyboard, the corresponding functions of the function keys can be realized. For example, adjust screen brightness and sound volume. Users have different preference while using Fn key. Some people like to press Fn + function keys at the same time to implement functions(Fn key unlocked), while others want to launch hotkeys without Fn keypress. Therefore, manufacturers provide the capability to lock and unlock the Fn key. ...