By Rebecca Albert 
1. Using the Action Center:
This is the quickest and easiest method:
- Click the battery icon in the notification area on the far right side of your taskbar.
- In the Action Center that pops up, you might see a brightness slider directly.
- If not, click on “Expand” to reveal more options, which should include a brightness slider.
- Slide the brightness control up or down to adjust the screen brightness to your preference.
2. Using the Settings App:
- Click the Start menu (Windows icon) in the bottom left corner.
- Select Settings (gear icon).
- Go to System and then Display.
- Under Brightness and color, locate the Change brightness slider.
- Drag the slider left or right to adjust the brightness level.
3. Using Keyboard Shortcut Keys (Laptops Only):
Many laptops have dedicated brightness control keys on the keyboard. These are usually function keys (F1-F12) with brightness symbols or icons.
- Look for keys with sun symbols or brightness indicators. These might be labeled with “Fn” next to them, meaning you need to hold the Fn key while pressing the brightness key.
- Experiment with the keys (usually one increases brightness, the other decreases) to find the desired level.
Additional Tips:
- Some laptops may have automatic brightness adjustment based on ambient light. You can usually find this option in the Display settings within the Settings App.
- If you can’t adjust brightness using any of the methods above, your display driver might be outdated. Try updating your display driver through Device Manager.
By following these methods, you can easily adjust the screen brightness on your Windows 10 computer to suit your needs and viewing conditions.