I have a 2008 Mac Pro with separate internal HD's for Mac & Windows. While formatting a third internal I noticed that my main HD now has a partition titled "disk0s3." It is 128 MB and says the type is Microsoft Reserved. I did not use BootCamp to install Windows and do not have a Windows partition on my main HD so I am wondering what this is and where it came from. Does anyone else that boots windows from a separate HD have this partition? Could it have come from one of the system updates? What would happen if I deleted it? It is tiny so I am not too concernedjust wondering why it's there.