id summary reporter owner description type status component version resolution keywords cc guest host 8361 Win7 Host BSOD: IRQL_NOT_LESS_OR_EQUAL when starting VBox moomoo I'm running a Win7 Enterprise host on an Intel i7 2.80 GHz with 8GB RAM. I had VBox installed and running fine initally, but after some update [ it might have been a windows update, VBox update, or both ] I get a blue screen of death [ IRQL_NOT_LESS_OR_EQUAL ] as soon as I try to start up VirtualBox. I have uninstalled and reinstalled and rebooted many times, trying with versions 3.2.12, 4.0.2, and 4.0.4 and I keep getting the BSOD. I have attached the dump files of the latest crash using 4.0.4. defect closed other VirtualBox 4.0.4 obsolete BSOD, blue screen other Windows