Our Mac mini has always been this way since new. It has the DVD drive and c2d. I have upgraded it trying to resolve the issue but it is still there. It now has 8gb of ram, 128gb SSD m4. Though it is two versions of the OS behind and considering upgrading it to mountain lion too see if that helps. The OS has been installed fresh multiple times. It is okay after a fresh reboot, but after the day is up is starts to slow. If you go more than one day or so it is really slow. We have to restart it every day. I am sick of the issues it has given us. Any one have any other ideas on how to solve this? Would the OS upgrade be worth it?