High contrast mode keeps coming on for a user.

[Rob_D]

Hi guys,

 

Bit of an odd one. We have a student who's laptop (domain joined and managed the same as all out other computers) keeps going into high contrast mode.

Does anyone know if there's any way to see when/how high contrast mode is triggered?

I can't find any way to accidentally turn it on, can anyone think of anything?

 

By this point, pretty much everyone involved is thinking user "error", but it would be nice to be sure.

 

Thanks for the help.

[Mark182]

Have you seen it do it after a re image? Is the student doing it by pressing left Alt + left Shift + Print Screen?

[Rob_D]

We've not re-imaged the laptop(s) yet as the student has had the problem across multiple devices (All laptops).

 

We've never seen it happen, they only come to us after it's already broken, and no-one else as has either far as we know.

 

It is possible that the student is using the shortcut keys intentionally, but it seems unlikely that they would do this accidentally. I'm still giving them the benefit of the doubt, so was wondering if anyone knew of a way this could be done inadvertently, or at least without an "are you sure" popup.

[saggu]

Hi guys,

 

Bit of an odd one. We have a student who's laptop (domain joined and managed the same as all out other computers) keeps going into high contrast mode.

Does anyone know if there's any way to see when/how high contrast mode is triggered?

I can't find any way to accidentally turn it on, can anyone think of anything?

 

By this point, pretty much everyone involved is thinking user "error", but it would be nice to be sure.

 

 

 

Thanks for the help.

 

I have seen this happening. It was the profile issue. Deleted the students profile and when logged back new profile was created fine,

[free780]

It's a keyboard shortcut. I wrote a log off script to turn it off. The setting doesn't stay on just for the user that enabled it.

[Chris_]

Is there a keyboard shortcut for high contract mode?

 

We've had a few users set their Windows 10 profile to black and white with the shortcut 'Ctrl + Win + C', which I guess could be when they're trying to use 'Ctrl + C'.

[witch]

If it is one user across many devices then I would agree that it is a profile issue

[Rob_D]

Thanks for all the suggestions.

 

If it is one user across many devices then I would agree that it is a profile issue

We use local profiles for the students, which should clear at shutdown. I'll make sure this is happening on the laptops.

[free780]

Here are the scripts

Per User (include it in your logoff script).

Start-Process -wait C:\Windows\resources\Themes\aero.theme

Stop-Process -Name "systemsettings" -Force -Verbose

 

This was an attempt at turning it off Per Machine. But I couldn't get it to work.

 

Start-Transcript -Path c:\temp\hc.log -Verbose

$hcenableds = Get-ChildItem -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\SystemProtectedUserData' -Recurse | Get-ItemProperty | Where-Object -Property HighContrastEnabled -eq '1' | Select-Object -ExpandProperty PsPath

 

$pspathold = 'Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE'

 

$hcenableds.pspath -replace [regex]::Escape($pspathold),'HKLM:'

 

 

foreach ($hcenabled in $hcenableds){

Set-ItemProperty -Path $hcenabled -Name 'HighContrastEnabled' -Value '0' -Verbose}

Stop-Transcript -Verbose