I am very upset and am ready to buy a different computer for my personal use than my iMac 20". I am running OS X 10.5.6 and it's a 2.4 GHz Intel Core 2 Duo with 2 GB 667 MHz DDR2 SDRAM and the 320 GB HD. My DVD/CD won't accept/load the CD/DVD at all and the real kicker of it is is that the...