The intro I have had my iMac for about 4 months, i have been using it as my main desktop since. I have noticed black smudges, kinda like finger prints on the screen that would not go away after cleaning it with a damp cloth. I removed the glass panel and cleaned inside the glass and the problem still remained. This is not the main issue, i can live it with. I have two iMacs with the same specs, one is in my main home office that i used most of the time while the other is my home that i use not that much. The smudges does annoy me when i watch movies a little bit but its not enough to get me to replace my mac. I was thinking since i used my office iMac more is it possible to switch the hard drives on them so that i get all the info from my office iMac onto my home iMac without complications? Since i dont use the home iMac as much as the office one i can tolerate a few black smudges more and i would have an iMac in the office that looked new. If i switch the hard drives will it be as if i switch macs and if anyones knows how to fix the black smudges it would be a great help. Thanks.