My SPA2210 speakers (bought yesterday) only play sound every three seconds, and only for half a second at a time.

I've got a I5-2500K processor, Intel DQ670W Motherboard, 8Gb ram, Windows 7 64-bit professional in Finnish. It does not matter if i plug the speakers in the front panel or the backpanel or if i have the USB inserted into an usb plug on the computer or use an external USB-power adapter. I tried updating my chipstet-drivers, my bios, my audio drivers, there was no difference. I also enabled and disabled USB legacy from the bios. The integrated soundcard is a Realtek, with RTKVHD64.sys driver with version 6.00.0001.6710.

Video of the problem: http://www.youtube.com/watch?v=Lg5He...&feature=g-upl

On my older computer, with a C2D processor at ~1.8Ghz, windows 7 32-bit Professional in English the sounds plays ok.