Why Is My Computer Running Slow?

Practical checks

Start with the basics.

1. Restart the computer and notice whether the slowdown is constant or only happens with specific programs.
2. Check available storage. A nearly full system drive can affect everyday performance.
3. Check startup programs and close software you do not need running in the background.
4. Watch for high heat, constant fan noise, freezing or crashing; these can indicate hardware, cooling or storage problems.
5. Back up important files when the device is unstable and ask for a diagnosis if the problem keeps returning.