Log in on an admin account, click on the little lock at the bottom of the get info box, type in the admin password, then check the ignore permissions box at the bottom.
Do NOT Touch this computer!!! Touching this computer WILL cause irreversible brain damage.
It's Un-Canadian to oppose a warming trend.
WARNING: If you see links to ads in the above post, blame the cheesy ad-linking software used by the owners of this website. I do not endorse these links. Don't click on them.