id summary reporter owner description type status component version resolution keywords cc guest host 11208 Unable to start any Linux Guests after Windows 7 Patching WhyMe Upgraded to Latest version of VB 4.2.4 on Win7 x64 host and all guests worked perfectly. Applied latest Windows 7 Security patches and now all guests freeze post GRUB boot screens. defect closed other VirtualBox 4.2.4 obsolete Linux Windows