Locked from System Preferences
Hello
I've recently bought a 2nd hand G5 with 10.5 but I'm unable to access system preferences or install new software.
I could open the preferences screen but everything was blank.
As it was asking for a user password I didn't have I re-set the account from cmd S at start-up that looked like it was straight after a new install (name, address etc).
After this system preferences in the dock turned into a '?' and it no longer responded at all.
I have now totally reinstalled the OS (back a few updates to 10.5.1) and back with the same problem.
Any help would be great!
PowerMac, OS X Mountain Lion (10.8.1)