Hi, I have two problems with my MacBook right now. I'm sure these problems are somehow related, so please read them both. A few months ago, I successfully made a 50GB partition on my MacBook with Boot Camp to install Windows XP on it. While this was running fine, I did not need to use it anymore after a few days, as it is annoying to have my MacBook start up to Windows XP if I forget to hold the Option key down during a boot up. Naturally, I just opened up Boot Camp Assistant and simply deleted the partition. Now here is the problem: Though I have the memory back, every time I reboot my MacBook WITHOUT holding down the Option key, it attempts to start up Windows XP and gives me an error message about no Boot Disk. Now that's the first problem. Though it is a small problem, it is still a nuisance. Now for my SECOND problem: I need to have Windows 7 on my computer now. But every time I try to make a new partition, I get an error. "The disk cannot be partitioned because some files cannot be moved." I have a strong feeling this has to do with the past partition I deleted, but I have no clue how to approach this. I googled the problem, and saw some answers but none work for me. I backed up my drive on an external hard drive with Time Machine, and then I erased the free space in Disk Utilities, but it did not work. I even tried verifying/repairing disk permissions. So if anyone here could offer any help at all, I would very much appreciate it.