why is grub still loading?
 

I recently bought a new 60gig hd for my laptop, and i decided to install ubuntu breezy badger. Then i deleted all my linux partitions. I expected my drive to be totally clean and unpartitioned so when i turn on the laptop it would give me the no operating system found error. However, when i booted up i still found grub looking for an operating system. Is there a way to totally clear the drive the way it was when i bought it.

You deleted all the partitions, but you didn't touch the Master Boot Record (MBR). If you want to clear it, boot off of a Linux rescue disk and do:

This overwrites the first sector of the hard drive (which holds the MBR) with zeros.

Alternatively, you can just go ahead and install the OS you want and let it overwrite the MBR>

Or use a disk wipe utility like Darik's boot and nuke.

The fastest way would be the dd way, but dban also wipes everything physically...