diff --git a/wfvm/autounattend.nix b/wfvm/autounattend.nix
index 66744b7..13505eb 100644
--- a/wfvm/autounattend.nix
+++ b/wfvm/autounattend.nix
@@ -13,7 +13,7 @@
 , timeZone ? "UTC"
 , services ? {}
 , impureShellCommands ? []
-, driveLetter ? "E:"
+, driveLetter ? "D:"
 , ...
 }:
 
diff --git a/wfvm/utils.nix b/wfvm/utils.nix
index 4084eca..3b42a0a 100644
--- a/wfvm/utils.nix
+++ b/wfvm/utils.nix
@@ -9,9 +9,10 @@ rec {
     "-cpu host"
     "-smp ${cores}"
     "-m ${qemuMem}"
+    "-M q35"
     "-bios ${pkgs.OVMF.fd}/FV/OVMF.fd"
     "-rtc base=${baseRtc}"
-    "-device piix3-usb-uhci"
+    "-device qemu-xhci"
     "-device e1000,netdev=n1"
   ] ++ extraFlags;