To change the ownership YOU need to have "root" privileges. If the account was mistakenly setup as root during the first boot, it may revert back to the position of not identifying the new user. When YOU installed the Distro, did YOU set up user before or after setting up the administrator account? Or did YOU inherit this system from a relative, friend or associate? Thereby not having actually installed the Distro YOURSELF. If YOU are in a position to reinstall, it may solve YOUR problems. There are available Ubuntu CD-ROM's for free, with the shipping for free, if YOU would like to venture into a more current Distro that works sweetly. Or for small change I totally recommend
www.OSDisc.com for highest quality CD-ROM's.