While starting a virtual machine on Hyper-V, if you get Not enough memory in the system to start the virtual machine error, here is how you can fix the issue. It rarely happens, but you can fix it ...
Windows quietly squeezing memory so your PC doesn't have to panic.
WTF?! Now you can bypass your hard drive and store your whole operating system in your VRAM (should you want to). Well-known Windows modder NTDEV has demonstrated how, and it's surprisingly painless.