I just picked up a newish laptop for my wife. Dell running Windows 7 (not ready to mess with 8 yet, and this laptop doesn't have a touch screen so why bother?). Decently fast i5, 8GB RAM, fast SSD. On a fresh install of Windows and Foobar, I actually heard stuttering and static through multiple DACs including the DA8. Wiped the drive and started fresh, now it works perfectly. I didn't do anything different as far as settings the second time around.... it just worked better on its own after the reinstall.
Meanwhile, another laptop we have is getting long in the tooth as far as specs.... i3, 4GB RAM, older 5400rpm HD.... and it has had many DAC drivers installed/uninstalled over the past few years. This thing never gives me a single hiccup.
Sometimes computers are random. And frustrating. Hopefully everyone gets theirs figured out the way the want.