Hi, I just recently bootcamped my computer and started running Win7 on it. Everything worked until last night I was cleaning up some files in OSX, repairing permissions, installed Sophos antivirus software, etc.. Today when I tried to boot into the Win7 it says Insert bootup disk or something along those lines on a black screen. So I started OSX and looked at the diskutil in which my Bootcamp partition is now labeled disk0s4 and will not mount. I tried repairing and it says: Invalid BS_jmpBoot in boot block: 000000 Volume repair complete. Updating boot support partitions for the volume as required. Error: Disk Utility can't repair this disk...,disk, and restore your backed up files. When I run the bootcamp utility it says I still have Win7 installed, or rather it gives the option of Uninstalling Win7. Diskutil Info says the following: Device Identifier: disk0s4 Device Node: /dev/disk0s4 Part of Whole: disk0 Device / Media Name: BOOTCAMP Volume Name: Escaped with Unicode: Mounted: No File System Personality: MS-DOS Type (Bundle): msdos Name (User Visible): MS-DOS (FAT) Partition Type: Microsoft Basic Data OS Can Be Installed: No Media Type: Generic Protocol: SATA SMART Status: Verified Total Size: 20.0 GB (19999490048 Bytes) (exactly 39061504 512-Byte-Units) Volume Free Space: 0 B (0 Bytes) (exactly 0 512-Byte-Units) Device Block Size: 512 Bytes Read-Only Media: No Read-Only Volume: Not applicable (not mounted) Ejectable: No Whole: No Internal: Yes Solid State: No What is going on here? I'm running OSX Mavericks, Bootcamp 5.1.2, rEFIT, and Win7. Thank you very much!