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I am receiving a Guru Meditation error on VM startup. The VBox.log is attached.

Why do you have a test build of the Guest Additions installed? (5.2.1). I would try booting the VM in safe mode and installing up to date GAs.

Did you turn off PAE/NX? I don't have a Win10-64bit VM on this PC, but my Win7-64bit VM has this enabled. I vaguely recall that Win10 requires NX, but the setting may be getting ignored in that case.

00:00:03.023677 Path <string> = "F:\VirtualBoxDisks\windows10-2.vdi" (cb=35)

VDI on external media, mismatched name. I take it that you did not install Windows 10 into this VM yourself. Has the VM ever previously worked on this host?

It may also be interesting to see the VBoxHardening.log file.

Why do you have a test build of the Guest Additions installed? (5.2.1). I would try booting the VM in safe mode and installing up to date GAs.

I don't know why. I installed the GA that VirtualBox suggested when I installed 5.2.22

Did you turn off PAE/NX? I don't have a Win10-64bit VM on this PC, but my Win7-64bit VM has this enabled. I vaguely recall that Win10 requires NX, but the setting may be getting ignored in that case.

No, it has never been turned on.

VDI on external media, mismatched name. I take it that you did not install Windows 10 into this VM yourself. Has the VM ever previously worked on this host?

I installed Windows into the VM myself from a licensed retail ISO and yes, the VM has been running fine for over 6 months

It may also be interesting to see the VBoxHardening.log file.

Log is uploaded


I'll trying reinstalling the GAs

Yep, reinstalling the GAs solved the problem once again. Thanks mpac.

Thanks for reporting back.