Cannot adjust Brightness after update windows version 2004

[Prasun11]

after windows version 2004 update , i cannot adjust brightness.brightness is fixed in lowest position after drive update.please help me.

[TEJ1602]

@Prasun11, Welcome to HP Support Community!

Let us try to isolate and resolve the issue, follow the steps below-

Reinstall the display drivers-

1) In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results.

2) In Device Manager, expand Display Adapter. 

3) Right-click on the Display Adapter, and then select Uninstall device > Delete the driver software for this device check box > Uninstall.

4) Restart the computer. 

Also, try updating the computer - 

Step 1 Windows Updates - 

1) In the search box, type, and open Windows Updates. 

2) Check for updates. 

3) If the updates are available, click on install and restart the computer. 

Step 2 HP Support Assistant Updates - 

1) In the search box, type, and open HP Support Assistant. 

2) Check for updates. 

3) If the updates are available, click on install and restart the computer. 

Hope this helps! Keep me posted. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!