Ok thank you. It is on a netbook that doesn't get used much and doesn't have anything important stored on it. It's something that I don't really want to put any money into (replacing the drive). How then is a sector that has been marked stored or remembered? I figured it was some sort of file or registry entry that simply told Windows not to write to that part of the hard drive.
The physical drive has a dedicated sector to record bad sectors so it will not be an issue once marked.