I am currently running Windows 10 preview build 10049 on my surface pro (1st generation). Ever since this recent update (and I guess another recent change I made was using a power cover instead of the original type cover) I've been having frozen programs while working on it. They're not intense resource drainers either. I was using it in class today with word, one note, PDF, torrent in the background, and a chat client in the background. I usually always have these on plus more, but everything freezes up. I can open start, I can't shut down nor restart, can't close my applications (just says waiting for program to respond and loads forever), can't alt + ctrl + delete. I'm forced to do a hard reset by holding the power button. It's happened about 4-5x already. Anyone else have the same issues? I have a Bluetooth dongle in the USB port for my mouse and a microSD plugged in, which is always there prior to windows 10