id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 11350,Guru (VERR_INVALID_RPL) when booting Windows 7 with Nested Paging,jim.rather,,"Using Ubuntu 12.04 x64 as my host OS and VB4.1, I am able boot my Windows 7 partition from within Virtualbox with no problems. When I upgrade to VB4.2 I get the Guru Meditation error. I am able to boot my Windows partition by unchecking Enable Nested Paging, however this considerably slows down the VM. The VM is essentially unusable. I have attached my VBox.log Note: I originally entered Ticket #10951 but did not see the request for my Vbox.log ",defect,closed,other,VirtualBox 4.2.6,fixed,,,Windows,Linux