I bought a new laptop a couple of months ago, which came with Windows 10 pre-installed (no upgrade or anything).
I just recently noticed that there is a windows.old directory in the C root.
C:\Windows.old>dir
Volume in drive C is Acer
Volume Serial Number is D261-608A
Directory of C:\Windows.old
12/07/2015 12:22 AM <DIR> .
12/07/2015 12:22 AM <DIR> ..
12/06/2015 09:38 PM <DIR> Program Files
12/06/2015 09:38 PM <DIR> Program Files (x86)
12/07/2015 12:22 AM <DIR> Recovery
12/06/2015 07:56 PM <DIR> Users
12/06/2015 09:42 PM <DIR> Windows
0 File(s) 0 bytes
7 Dir(s) 175,413,530,624 bytes free
Why is it there? Was this unit or hard drive upgraded in the factory?
Windows Version 1511
update.Windows.old
directory was created automatically during this installation.