Well shoot. Just downloaded and tried to run the update on my 8.1 VM, but it needs 20gb of free space to install, and I try to keep my VM disks small, so no go.
Does anyone know an easy way to increase disk size in Virtualbox? The only way I've found via googling is to create a second virtual drive, attach it to the machine, then with both old and new drives mounted, run Gparted to clone the old drive. I wish Vbox had a quick way to just redifine VDI size.
Might be faster to just kill the 8.1VM and use a win10 ISO to just do a fresh, full install on a new VM.