There is an icon that showed up on my dashboard after updating to 12.04 called "install RELEASE". When I go through steps to install it, I eventually get a notice saying:
- There is 'no operating system detected' on my computer
- Would I like to 'erase and use entire disk', or 'specify partitions manually'.
This is alarming, and I don't know what it means. I also don't know if I even need RELEASE.