Computer

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Across
  1. 2. A user with admin status
  2. 4. GUI 1
  3. 7. Plug-in parts of a computer
  4. 9. A display area for an app
  5. 10. Tree structure is
Down
  1. 1. GUI 3
  2. 3. Guard computer against network break-in
  3. 5. Web surfing
  4. 6. Central part of OS
  5. 8. A program under execution