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“Not enough memory” error message when starting Virtual Machines

2 December 2013 Leave a comment

I have a 16GB laptop which when running Windows 8 I was able to start some 10GB+ virtual machines for doing SharePoint development on.  However since upgrading to Windows 8.1 I have been unable to start up these virtual machines.

The cause is in the more aggressive way that Windows 8.1 reserves memory for itself and fortunately Microsoft have some registry settings we can tweak to change this.  For information on these keys refer to http://support.microsoft.com/kb/2911380.  If you want to avoid restarting you machine at least restart the “Hyper-V Virtual Machine Management” service, and schedule a restart for the first convenient opportunity.

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