virtualbox.org

Windows 7 Professional guest running in virtualbox on Lubuntu host

I am periodically getting Your computer is low on memory messages. So I went and changed System Properties->Performance Options->Virtual Memory
but no matter what changes I make, it always reverts to some default settings after reboot [see attached]

Any ideas on what is preventing changes on Virtual memory settings in the Win7 guest?

Moved to Windows guest

I doubt that this has anything to do with VirtualBox. What are the settings on the previous screens? Is it set to let Windows choose and best performance of programs?