When I installed Win8 Developer Preview over my WinXP, it produced a Windows.old that contained the old "Program Files" folder among other things.
After a few weeks of mucking around with W8DP not-supporting some of my hardware, I sold the PC, while keeping the harddisk.
Now when I connect the harddisk to my new PC (running Win7) via a USB-SATA adapter, everything appears to be present except for most of the contents of the Windows.old folder. Explorer shows it as zero bytes. There is just one chain of folders inside Windows.old:
I have tried taking ownership using this, but there is no difference.
Properties of the harddisk shows the space that used to be occupied by the Windows.old folder as free. (Same according to WinDirStat).
Have I somehow permanently lost the files?