For background information, I'm running a mid-2010 MacBook Pro, and upgraded to OSX Lion (10.7.1). I used Boot Camp while on Lion to create a Windows 7 partition. So yesterday I decided I wanted to attempt to resize my Boot Camp partition for Windows 7, so I shrunk my Lion partition using Disk Utility under the impression that I could boot into my Windows partition and use the Computer Management control panel item to extend the volume. However, since that didn't work I (stupidly) decided to allocate the space as NTFS while on my Mac. (I was using MacFUSE and NTFS-3G). However, when that happened I noticed the day after that I couldn't boot into Windows anymore (it wouldn't show up when I held Option when booting up my computer). It would still appear in the Startup items list as "Windows", but when I tried to set it as a start up item, it would appear something along the lines of "no bootable device -- insert boot disk and press any key". I didn't have a Windows install disk handy at that time so I couldn't try it. Now here's the real problem. When trying to fix this issue through Disk Utility, I decided to erase the NTFS partition that I just created, and create it again. However, after creating it again my Windows partition (which was named 'Windows') suddenly turned into 'DISKS04', and now says it's an MS-DOS (FAT) format partion. Here is what a 'diskutil list' looks like: /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *320.1 GB disk0 1: EFI 209.7 MB disk0s1 2: Apple_HFS Mac 218.6 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3 4: Microsoft Basic Data 80.2 GB disk0s4 Also, when doing a 'Verify Disk', I get this: "Invalid BS_jmpBoot in boot block: 000000" And it does not allow me to do a repair. "Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files." I've tried booting from the Windows 7 installation disk I used to install Windows, and run a 'Startup Repair', but I have had no luck. The Windows 7 Repair didn't even find my windows 7 OS, and recognize it. Is there anything I can do to make my partition bootable through Boot Camp again? I don't really have any important data on the partition, but I would prefer to not have to re-install Windows 7, all of its updates, and all of my programs all over again. Thanks for any assistance, and please let me know if you need more information.