I just formatted my Macbook that was given to me by my girlfriend and after the installation I check the disk utlity and found out that my 80GB is actually 74.2 GB and Available disk has 55.8GB remaining. Currently the used HD space is 18.4GB I am wondering that I just freshly installed the OSX and it used up 18.4GB already? She told me she bought it in Macmall website with preloaded parallels and Windows Vista. I didn't like the way Macmall install the Vista so I reformatted the whole HDD wasnt expecting to have 18.4GB used already? Am I doing something wrong? Please help!