Changing the RAM/Memory Setting in Microsoft VPC

I recently added a shed load more memory to my lappy (thanks Orca), so I finally got round to increasing the memory on the various VPCs I use. So I did the usual of going to the settings, but the memory slider (to choose how much you want to assign) was not there. Not disabled. Not there at all!

In the end I removed the VPC (I didn't physically delete it, just removed it) and added it again, using the wizard. Hey presto, just like magic, I could change it again.

It's a bit like the old "have you turned it off and on again?"...