Windows 11 sound driver problem

I have a Windows 11 system running under libvirt/qemu. A recent Microsoft software update overwrote the audio driver. Device manager would not let me install the one from the virtio ISO because it had determined that the "best driver was already installed". But sound wasn't working. I solved this by going into device manager and deleting the windows driver, then adding the viogpudo driver from the ISO manually. After rebooting the virtual machine, audio was working again. Yours, -- Owen Dr O V Le Blanc