Windows 8 Upgrade experience: #2 Old files
When you do an upgrade or a new install on a system that already has Windows installed you get a Windows.old folder left behind with a whole bunch of stuff you no longer need.
The permissions aren’t reset so you have a painful experience getting rid of it and as its quite a few GB you really do want it gone.
While not insurmountable the problem should never have arisen in the first place