I have installed Hyper-V Server 2012 R2 on a server that had Hyper-V Server 2012. When I did this, the standard `Windows.old` folder was created. I now would like to remove that folder safely. The standard way to do that with a full GUI would be to use Disk Cleanup, but of course I don't have that option on Hyper-V Server.

Is there a formal way to remove that folder in this scenario? I know if this was Server Core I could install the full GUI including Desktop Experience, but that would be a lot of nonsense just to cleanly remove a folder.

My primary reason for asking, as opposed to just doing `rmdir /s` or some such, is that the `Windows.old` folder has a lot of junctions, and I don't want to break anything in the production OS copy as part of doing this.