MagicAndre -- I've been trying to follow your guides, but am lost. Something is causing pops, clicks, and dropouts in my audio, esp. at lower latency settings. Have periodic (15 second) CPU spikes, and somewhat high DPC/ISR involving WDF01000.sys (Kernel mode driver framework runtime), usbport.sys, hal.dll, and ataport.sys (in that order). Being system files, I assume there's no updates for any of these. This is a new, dedicated i7 machine for audio work, with all unnecessary services disabled (I usually shut off networking), and all drivers updated. I'm stumped. A zip of the trace file is at http://dougstunes.com/DPC-Interrupt.zip TIA!