I've installed Windows 7 recently and now I can't access (read, copy, delete) a lot of files.
When I try to open these files, I get the error that permission is denied (although I'm using administrator account).
When I inspect the file, owner is said to be Account Unknown(S-1-5-21-122...
I am able to change the owner of a file to my current account, but I still can't open it or copy it. Now it says that I don't have a permission from a current user (which makes no sense)
Some of the files are very important to me.
I booted Ubuntu Live and tried to access the files from there, but again "I had no permission".
In Ubuntu I used umask=0000
, owner was root.root and it appeared that file was open to be read, executed and edited. But still, I couldn't neither read, nor copy the files.
Also, I tried using "Linux Reader" which was able to copy files but copied files were locked as well.
Does anybody has any ideas how I can solve this problem?