Windows.old when upgrading - Delete?

[Madam ImAdam]

I ran the upgrade and now have a Windows.old folder taking up 31GBs. If you are not planning on rolling back to 8.1, you can remove this folder following these steps:
Windows.old Folder - Delete in Windows 10 - Windows 10 Forums

 

[someone2639]

You can delete it, but it isn't recommended unless you're pretty experienced in recovery and are on W10 for life no matter what