Question: I'd like to disable `ctrl`+`alt`+arrow keys changing the screen orientation. I've seen [here](https://superuser.com/questions/279756/how-to-disable-the-screen-orientation-hotkeys-in-windows-xp) that this is a function of the Intel graphics driver. So I followed the directions and `disabled hotkeys` in the `Intel graphics card control panel`, but the hotkeys are still `enabled`. Might there be some other program controlling this? I'm running a Lenovo T420.

Answer: 
After disabling these keys, I find that they sometimes remain in effect until after the system is rebooted. Here are two possible solutions:

* Try rebooting the system
* Try updating the video driver

If neither of those work, then you can use SpyBot's "System Startup" editor feature to disable the function keys StartUp module:

  SpyBot - Search & Destroy  

  <http://security.kolla.de/>

1. Make sure "Advanced" mode is enabled (under the "Mode" menu)
2. Select the "Tools" category (only available in Advanced mode)
3. Select the "System Startup" option
4. Find the tool called "hkcmd" and disable it (this is Intel's hot key manager module)
This following powershell command worked for me:

```
reg add "HKEY_CURRENT_USER\Software\INTEL\DISPLAY\IGFXCUI\HotKeys" /v "Enable" /t REG_DWORD /d 0 /f `

```