Hello, I really need some help. Since i upgraded from winXP 32bit to win7 64bit, i had no sound at all. Installed realtek sound drivers, checked device manager (the sound tab only listed "High Definition Audio") but still the playback devices list is empty. The headphones (they have cable-intergated mic) are not dead, I can use them on my phone. Tried multiple functioning headphones. It can't be the audio jacks because every microphone is listed (including the heaphones' one). The BIOS option for integrated audio is not present. A virtual audio cable works, so I suspect it is the integrated audio card that has mental problems.