How to fix broken NTFS-permissions

  1. Press the Start-button.
  2. Type "cmd".
  3. Right-Click "Command Prompt" that shows up, and click "Run as Administrator" (or just hit CTRL+SHIFT+ENTER).

Now go to the problematic area, and use the following commands:

TAKEOWN /F [dir] /R /D Y
CD [dir]
ICACLS * /T /Q /C /RESET