You can also swipe from the right edge of your touchpad as if it were the screen.
The problem is that on a laptop people are used to both visual and kinesthetic cues for their action. Just as much, any mouse "gesture" effect has to leverage our intuition about physical things... when a gesture in one place (a corner) causes something to happen elsewhere (a side), it feels unnatural and is going to keep feeling unnatural no matter how many fan boys wiggle noses and say "you're doing it wrong, this is really easy no matter hard you're claim to find it...".
Edit: The point is the bar appearing on the side cues the user to go to the side, regardless of their great dexterity at going to the corner if they happened to remember to do that (as the gp actually implies).
His mistake or just UI design so bad even a techie can't figure it out?
The amount of "you're doing it wrong" when it comes to addressing Windows 8/Surface UI issues is mind boggling.
It is nearly impossible to hit the charms hot corner inside a windowed RDP session when the window is not full screen.
Gestures and multitouch carry over RDP in Windows 8.
Opening the charms bar on a desktop computer is a rare event anyway. The buttons it exposes are primarily touch interactions used when holding a tablet running a Metro app. In a classic application, you wouldn't be using its search/share/device buttons, and it's faster to just press the Windows key to do a system/web search.
On my monitor, the charms appear really far from the corner of the screen. It's true that it's an easy target to hit. That isn't the only way in which I find interacting with the charms bar to feel like throwing hatchets at the side of a barn. The arm motion's remarkably similar, too.
Moving it up and to the right. You may remain seated.
It's a bit weird when you use a computer via VNC, though, because you have to move the mouse more precisely.
For the record, I despise all the Metro stuff and would cut it out if it were easy to do so.
On a tablet, you swipe it out from the left edge of the screen. Makes sense - so much sense that Apple copied the idea in iOS 7.
On a PC, you bring out the charms bar by frustratedly wiggling your mouse against the right edge of the screen for a few seconds before remembering that to make UI widgets appear out of the middle of the screen's edge, you inexplicably need to move the cursor all the way up or down to one of the corners.