My software update has not been so smooth... After choosing 10.1.5 for the software update I don't get the typical horizontal bar telling me what is being installed. Instead, the window with the various possible updates remains with a message at the bottom that says "Status: Installing, restart required". Last night at home I figured the Apple server was busy and left the machine running. Seven hours later same message. I quit Software Update to try again and the same message. This is on a G4 450. I go to work. G4 duel 500's. Same exact problem. No horizontal bar telling me what is happening. Now I find out I can't print from either machine. I go to another machine in the office (which is new), no problems with the update. Here is where I think the problem is. I bought and paid for 10.0 (and the 10.1 update) for home. In trying to convince the powers that be (in my office) that OS X was something we could use, I installed the same copy on my work machine. It was impossible at the time to get them to buy a copy. I have since been way too busy to sort it out and re-install a new copy. This will obviously be done shortly. It is on a total of two machines. I don't need a lecture on ethics or stupidity. What I need is opinions on whether or not this could be it. I happen to have installed QT 6 preview on both machines the day before. Should I re-install 10.4?