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I am not able to adjust my brightness at all. One day it was suddenly turned up all the way and I haven't been able to adjust it. My computer keys for it will not work and I also went into my settings to try and turn it down and it's frozen on being up all the time.
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Hi Ally,
Thanks for posting your concern here in the Microsoft Community! I know how frustrating it can be when your PC isn’t working properly.
To help you better, could you let me know if is desktop or laptop you're using? if its a laptop may i know what specific laptop model. Once I have that info, I’ll be happy to share some steps that might help resolve the issue.
Feel free to reply anytime I'm here to help!
Hi Again,
This issue often appears after a Windows update or driver change, and it’s usually caused by one of the following:
A missing or incorrect display driver, which prevents brightness control from functioning.
A disabled monitor device in Device Manager.
A conflict with HP-specific software, such as hotkey drivers.
A power plan or firmware setting that locks brightness at a fixed level.
These kinds of glitches can happen silently after updates, and unfortunately, they’re not always resolved automatically.
Here are a few steps that may help restore brightness control:
Check Display Drivers:
Press Windows + X > Device Manager.
Expand Display adapters.
Right-click your graphics driver (Intel, AMD, or NVIDIA) and choose Update driver.
If it shows “Microsoft Basic Display Adapter,” download the correct driver from HP’s support site.
Enable Monitor in Device Manager:
Expand Monitors.
Make sure your monitor is listed and enabled. If it’s disabled, right-click and choose Enable device.
Install HP Hotkey Support:
Visit HP’s support site and search for your laptop model.
Download and install HP Hotkey Support or HP Quick Launch Buttons, which control brightness keys.
Try Adjusting via Mobility Center:
Press Windows + X > Mobility Center.
See if the brightness slider is available there.
Check Power Plan Settings:
Go to Control Panel > Power Options.
Click Change plan settings > Change advanced power settings.
Expand Display > Enable adaptive brightness and turn it off.
Let me know how it goes, Happy to help!
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