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I was running Vista with two NTFS partitions (C: and D:), then formatted C: partition and installed Windows 7 RC. The second partition (D:) had some files security set on files and folders.
After Windows 7 was installed, some files on drive D: were not accessible anymore and I was getting “Access Denied” I tried to right-click/properties on the folders that were not accessible and changed their owner and changed permissions but still some folders were still inaccessible not matter what I did.
After some research, it turned out the tool “cacls” that allows one to display or change ACLs (access control lists) can help to reset ACLs. In Windows 7 it is called “icalcs”.
To reset files permissions:
Step 1: Run “cmd” as Administrator.
Note: In MS Windows 8 and above, press the Win+X keys, then choose “Command Prompt (Admin)”.
Step 2: Go to the drive or folder in question, for example:
.
