I know this is almost a year old, but thought I'd shared my 2cents.
We had a customer who could no longer access offline files, even while on the network, taking the PC off the network still unable to. No admin account could access the C:\Windows\CSC\v2.0.6 folder, taking ownership did not work, chkdsk /x /r said nothing was wrong. Booting off a Windows installation CD would also not allow us access to the folder... So what's the best way to rip through NTFS permissions? A bootable Linux USB stick!
I downloaded the latest Ubuntu distro, made a bootable USB stuck with Universal USB Installer, booted the PC in question and could access the files without a problem, so copied them to a folder in C: - booted the PC back into Windows, showed him where the files were, et voila, we had one happy customer.
I hope that helps someone else who has the same issue we did.
