This will give you an additional right click mouse option "Take Ownership"
I found it first when I installed W7 and was denied access to files I had written in the first place - it works on W8 because I found myself in the sam position after installing W8 last weekend
Take and Grant Full Control Permissions and Ownership
That s fantastic. It was almost too pleasurable wiping out that directory. There is one file remaining which is in the old system32 folder called flash32xxxxx.ocx that tells me I need admin approval (duh, I am the admin) but everything else deleted without any protest. And I now have 11GB free again. Thanks very much!!
Glad to help - I had trouble with the flash folder, but after several reboots, and another take ownership, I deleted the file inside the folder, then the folder.
I had noticed that I was continually being asked in my (Maxthon) browser to install a different version of flash, but after 4 or 5 (failed) attempts, gave up. The fact that this folder remained and I had failed to install flash must surely be connected, but I can't think why
I downloaded the upgrade version Win 8 Pro on Saturday so its probably the same as yours - my Clean up system files is still there -
I tried the "keep my files" option 3 times, without success, then settled on the "keep nothing" option, so I was surprised to find the setup had preserved my old (W7) windows file. I became suspicious when I saw the space taken up on my 160Gb SSD, so I started exploring and found the file which I think mickchev was complaining about. The system would not let me delete or open it, so I left it until I was happier with the new W8