I've installed Windows 2008 x64 on my HP Pavilion zv6252EA. Everything works great but I can't get the audio drivers to startup. A search round the internet and it seems many people are have audio problems with the 6000 series. I've started the audio services but the drivers get an error and the device can't start. I've tried many driver versions. I have a feeling it may be down to Unsigned Drivers - does this prevent them starting on 64 bit Windows - is there a way round this like a registry hack? Is there a firmware update for the motherboard - where are these found?