I am having a problem where through the day, my shift key randomly starts acting as if it is stuck. Clicking in file manager on a single file selects a whole group of files. Text is all capitalized when typing. I though I had a bad keyboard and even switched it out until the problem continued and then even happened with just my MacBook Pro's built in keyboard. I soon figured out that when the problem happens I have to click on a Mac application then click back to the windows one and the "stuck" shift key issue goes away...until it happens again a couple of hours later. I'm using Parallels 10 in Coherence mode on a MacBook Pro 2015 running Mac OSX 10.10.4 Yosemite. I am also running a CentOS 6.5 VM. I have tried changing the keyboard to performance mode for gaming and that didn't help. This problem is driving me nuts.