Source: HP Tech. Support
Basically HP is providing some registry keys to preferably enable/disable pop-ups that appear when Caps-Lock, Num-Lock, volume or brightness control buttons are pressed. The pop-ups are very annoying, takes longer than multiple seconds to disappear and appears on top of all other windows.
So, if you are alike me and want to stop the pop-ups from appearing forever, just download/save the following registry file and import into your registry (Saving the text below into a *.reg file and double-clicking should do the trick in case you haven't ever done it before).
P.S.
I just realized, the registry trick doesn't work if you have an older version of "HP Hotkey Support" module installed. According to the source page, the latest version can be downloaded from here: ftp://ftp.hp.com/pub/softpaq/sp57501-58000/sp57879.exe
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Windows Registry Editor Version 5.00 | |
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Hewlett-Packard\HP Hotkey Support] | |
@="" | |
"VolumeOSD"=dword:00000000 | |
"AmbientLightSensorOSD"=dword:00000000 | |
"BrightnessOSD"=dword:00000000 | |
"CapsLockOSD"=dword:00000000 | |
"NumLockOSD"=dword:00000000 | |
"ScrollLockOSD"=dword:00000000 |