Yes you can disable it, here is a link and step by step instructions:
http://www.askvg.com/how-to-disable-hot-corners-charms-bar-and-app-switch-list-in-windows-8-1/
1. Right-click on Taskbar and select Properties option.
2. It'll open Taskbar and Navigation properties window.
3. 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

1st option will disable Charms Bar and the 2nd option will disable App Switch list.
4. Apply the changes and it'll immediately disable hot corners in Windows 8.1.
Unfortunately, this still leaves the bottom right active as a charms bar hot corner. If they just had another checkbox for the bottom right, too, we'd be all set.... Thank you for pointing this setting out, though. Halfway there is better than nothing.
I love the initial response of "The charms bar help you do the things you do most often, like search, share links and photos, connect devices, and change settings without any difficulties." With
the exception of shutdown and control panel (both of which were before and thankfully, finally, are now again easier to access outside the charms bar), I haven't used the charms bar in almost two years.