I currently use a Dell PC, but it's starting to get really slow and infected with adware and spyware, so I've decided it's time to upgrade. I'm going to buy a MacBook. I know that that majority of my important files can be transferred over to the Mac, and a lot of the software that I use can be re-downloaded and registered with the same codes that I've purchased Spoiler (or re-pirated) . What I'm really worried about is my massive itunes library that is about 60% my own CDs, 35% CDs I've borrowed from people, and 5% downloads. Also, a good solid chunk of it was actually imported into iTunes from Windows Media Player. I'm concerned that if I back up my library onto a flash drive and transfer it to the Mac, the things that were imported from WMP will not copy. About a year ago I tried to copy some of the library onto CDs for my girlfriend, but all of the items that had been imported from WMP didn't work. Will the same thing happen if I back up the entire library and move it to another computer? If so it's going to be a world of trouble.