Hey there, I can be smart in some aspects of computers, but horribly stupid in others. Right now I am in one of those stupid phases. Okay so let's start at the beginning: I have Windows 7 and Mac OS X installed on my computer. I was feeling rebellious, so I decided to try and install Ubuntu. I created a partition for it, got an installation disk, and restarted the computer. When restarting, I pressed the C key (obviously) and installed Ubuntu on my computer. All was working well, and then I decided to restart the computer. When I held the option key down to boot from my Ubuntu partition, I couldn't! I loaded up Mac OS X and went to Disk Utility. There, I saw my partitions: Windows HD, Macintosh HD, and Disk0s3 (Ubuntu HD). Disk0s3 was grayed out, and when I tried to mount it, I got this error message: "The disk disk0s3 could not be mounted. Try running First Aid on the disk and then retry mounting." Of course, when I tried running First Aid, I learned that I couldn't (grayed out). I also tried erasing the partition, and even repartitioning the disk using a Windows 7 setup disk, but none of that worked. The partition type is Microsoft Reserved. I am completely and totally stuck. I have been searching the internet for an answer for upwards of 5 hours, and have found nothing comprehensible to me. Any help at all on getting this damn partition deleted would be immensely appreciated. Oh, I called Apple Care, and they were unhelpful, simply stating that I need to clear the drive and start over. That's not really an option, so I am hoping someone out here can help.