I can't quit system preferences ??

Try presing Option+Command and the tapping Esc - that should bring up a 'Force Qiut Applications' dialog. Select System Preferences in that dialog and click Force Quit. That should close it down and give you back contral of your system.

This solved the problem for me too! I was awaiting my iP110 printer to recognise the ink levels of a compatible colour cartridge (this can take time) when System Preferences decided to freeze. Thank you again.

Glad to be of help!

mine too, thanks!

It solved mine too! Easy! Thanks!

thank you so much this helped more than you know, I was stuck in system preferences for 30 minutes!