Try this:
1) Find your pci string in
"Device manager,
Sound, Video and game controllers",
"High Definition Audio Device",
properties,
details tab,
Property: Parent,
Value: Your-PCIString
2) Open regedit and "navigate" here: Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\
Your-PCIString\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties
Obviously, you have to substitute the letters "Your-PCIString", in the above path, with the pci string you found at point one.
3) Change the
MSISupported value, from 0 to
1. If it doesn't exist, create a new
dword (32-bit value), name it
MSISupported, give it
1 as value.