id summary reporter owner description type status component version resolution keywords cc guest host 6649 Windows crash dump won't work properly with additions installed => Fixed in SVN bifferos "Guest: Windows XP, SP2. Host: Slackware 13.0 (also reproduced on Windows 7 host) Reproduced with these versions: v3.1.4, v3.1.6 Steps to reproduce: My computer -> Properties -> Advanced -> Startup and recovery. Ensure memory dump is on. Set the following registry entry (assumes PS/2 keyboard): {{{ [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\Parameters] ""CrashOnCtrlScroll""=dword:00000001 }}} (Don't forget to reboot) This will allow you to 'blue screen' on demand. Hold down right ctrl and press 'scroll lock' twice, to get crash dump. Without additions installed, Windows writes a memory dump as expected. With additions installed, the guest locks up, consumes 100% cpu and no memory dump appears. Sometimes (but not always) the machine recovers and reboots, but in either case no dump is written. " defect closed guest additions VirtualBox 4.1.2 fixed display driver Windows Linux