My Surface Pro 2, which has been working just fine for the last 6 months, for some reason after putting it to sleep and waking it, won't respond to swipe from the right to bring up the charms. I can still swipe from the left to bring up the background processes. I haven't changed any settings at all, and this was a few weeks after the July updates, so I can't figure out why it stopped working for no reason. Does anyone have any ideas? Is there a way to test if this a hardware issue or software? Thanks in advance!