lejaz,
By disable - do you mean completely (it is 'the' way to get to some things, so that may not be prudent) or make it less invasive (not pop up as easily)?
The touchpad options have to do with the device drivers - written by/for the touchpad manufacturer. Moving the actual cursor to the areas (top and bottom right of the screen) will still result in the CHARM appearing. The option likely being referred to
by Drew1903 is probably (at least partially) #4 from the list of tips I link to several times in this and other like-minded conversations...
http://answers.microsoft.com/en-us/windows/forum/windows8_1-desktop/modifying-windows-81-for-those-who-want-to-ease/47425a3a-a652-4d0a-9537-68d36fa36947
METHOD 1: Using the taskbar Properties
[VIDEO LINK]
- Right-click on the taskbar and select Properties option.
- It'll open the Taskbar and Navigation properties window.
- Go to "Navigation" tab and uncheck following options present in "Corner navigation" section:
- When I point to the upper-right corner, show the charms
- When I click the upper-left corner, switch between my recent apps

The 1st checkbox (being empty) will 'disable' one method of accessing the Charms and the 2nd checkbox (being empty) will 'disable' the App Switch list. Apply the changes and it'll immediately disable those hot corners in Windows 8.1.
METHOD 2: Using PC Settings
[VIDEO LINK]
You can also disable hot corners using PC Settings (via the modern UI Control Panel).
- Move your mouse cursor to top-right or bottom-right corner of screen and click on Settings icon present in Charms Bar.
- Now click on "Change PC settings" option. It'll open PC Settings page.
- Now go to "PC & devices **** --> Corners & edges" section.
- As you can see in the screenshot below, you can disable the hot corners by setting both options present in "Corner navigation" section to Off.

Source: http://www.askvg.com/how-to-disable-hot-corners-charms-bar-and-app-switch-list-in-windows-8-1/ via
Hamiltonboy78
** Note - that only disables access to the charms from the upper corner. If your problem is it appears at all/when you move your mouse to the lower right corner - it's a registry value change...
[VIDEO LINK]
- Open the notepad application (Windows Logo Key + R, type in NOTEPAD and click OK.)
- Paste the following into notepad:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ImmersiveShell\EdgeUI]
"DisableCharmsHint"=dword:00000001
3. From the Notepad menu, choose "File" --> "Save As".
4. Choose the "Desktop" from the left pane.
5. Change the "Save as type" and the bottom to "All Files (*.*)".
6. For a File Name type:
DisableCharms.reg
7. Click on "Save".
8. Close the notepad application.
9. Locate the file (DisableCharms.reg) on your desktop and double-click it.
10. Answer in the affirmative to all questions.
Now the upper and lower right corners are inactive for the charms.
You can still open the charms by going to the lower/upper right corner with the pointer and dragging straight up/down. It's just a little more effort than hitting that corner was.
As for it being disruptive - that seems to be a personal/per individual thing more than an overall consensus. I personally rarely see the CHARM without a keyboard shortcut being invoked or deliberately trying (sometimes it is frustrating for me to make
it appear when I need it if only using the mouse) - so it is NOT disruptive to me at all in the way being described here. I exclusively use non-touch capable devices (for Windows anyway) at this point.
Hope that helps!