VirtualBox 4.0.6 x64 Randomly Resets Guest VMs

Since “upgrading” to the 4.0.6 release VirtualBox for 64-bit Windows, it has begun resetting guest VMs randomly.  The VM I’ve been using most frequently is Windows Server 2008 R2 x64 with SQL Server 2008 R2 x64 and Visual Studio 2010.

Sometimes VBox doesn’t reset the VM. But when I shutdown the VM (from inside or outside the guest), the shutdown process seems to hang and something just spins CPU at about 50%

I’m experiencing this multiple times per day, so I’ll probably have to revert to 4.0.4.  Here’s the Windows Error Fault Details from the most recent reset:

Problem signature:
Problem Event Name:    BlueScreen
OS Version:    6.1.7601.
Locale ID:    1033

Additional information about the problem:
BCCode:    1a
BCP1:    0000000000041287
BCP2:    0000000000000000
BCP3:    0000000000000000
BCP4:    0000000000000000
OS Version:    6_1_7601
Service Pack:    1_0
Product:    272_3

Files that help describe the problem:

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I have also attached the Windows Error Report xml file (

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