Two operating systems

[naveenbellary]

hi,
i have toshiba a-45 s150 notebook.... and 60 gb had disk which is not partitioned and i have two operating systems and both are professional .....now i want to delete one of them....but i dont know the process...... could anybody tell me how to do it?

 

[jq1801]

you could just backup and reload the system. this is what I would do because it would give you a fresh install.