I am using VirtualBox 4.0.4 with Windows XP 32bit SP2 guest and VirtualKD 2.5.2. Both are running on Windows XP 32bit sp3 host. I patched the Vboxdd.dll according to the instruction and run vminstall.exe in the guest. When I startup the vmmon.exe, this is no VirtualBox process displayed. There is no way to start up the windbg.