Weird... I upgraded Windows to 8.1 and I haven't heard a glitch since (I think). What makes it a bit confusing is that I just purchased my first pair of "high end" headphones, and I'm actually hearing small defects in some recordings that I never noticed before. Maybe I should get an external...

I took a chance and bought one off ebay, no returns. The new version. Random clicks and pops, no matter what file format or output method. I've tried everything that I can think of. My E17 worked fine on the same PC with USB and ASIO. This is on Windows 8.