Windows 7 Adio Service Freezing Shutdown?

I recently built a new computer. Completely fresh OS (Windows 7 Ultimate x64) installation. Everything went well, installed new drivers and downloaded all Windows updates, but one day i started having complete system freezes when i shutdown or restart my computer. When i give my computer the shutdown command it starts shutting down all my programs and goes to shutting down... screen. "In progress" circle rolls for a while until it freezes and i have to do hard shutdown.In safe mode my computer shuts down and restarts normally. So i started process of elimination. I went through all my processes and discovered that if i disable Windows Audio Service my computer shuts down normally without any problems. If i enable it and try shutting down I get stuck in shutting down screen.

Funny thing is, my audio works perfectly. I have Soundblaster Titanium X-Fi soundcard and i tried reinstalling its drivers, but it didn't seem to affect the problem. My soundcard is hooked to my amplifier through SPDIF. I use Winamp as a music player and i have WASAPI plugin installed to it. WASAPI plugin bypasses the resampling process that Windows Audio Service does, but i always close Winamp manually and the plugin with it before shutting down, so it shouldn't be the problem. I've also disabled the onboard audiochip from bios. The only settings i've done in Windows Audio panel is that i have Line-In listening to SPDIF and i have SPDIF as default output.