What’s the Difference Between Restarting and Shutting Down My Computer?

When you reboot, the power stays on for certain devices, while a full shutdown cuts off power completely. If your system has quick boot settings enabled, it may not fully reset. If you're troubleshooting hardware issues, doing a complete power cycle is usually recommended.

Basically, during a shutdown, Windows saves the memory state, similar to hibernation, while a restart doesn't preserve that state. This is why after a shutdown, your Windows drive might be read-only in Linux, but after a restart, it works just fine.

Windows 10 and 11 have a feature that changes the shutdown procedure to something more like hibernation. That's why shutting down feels fast—it doesn’t fully shut down the OS. Restarting is a true clean restart where everything resets, even if it takes a bit longer!

It turns out that when you shut down a Windows PC, it often doesn't completely shut down in the traditional sense. Instead, it tends to go into a hibernation state to allow for quick startups. Restarting, on the other hand, clears all the cache and memory, giving you a fresh start for your system.

When your computer boots up, it performs a POST (Power-On Self-Test) before the OS loads. If you restart and skip the POST, it's not a complete reset. That's why some folks just prefer to power off completely; it feels more reliable.