How to low level the laptop hp g60-23ous need to erase everything i got the start up disck!and can reboot

That is an option when you are installing the operating system. Choose to delete and recreate the windows partition.
Here are the details:

Boot your computer with your Windows CD-ROM inserted. When you get the 'Press any key to boot from CD' message, do so. (If you don't see that message before Windows starts, restart Windows, press the key you're prompted to enter for your PC Setup program, and change the boot order so your CD drive is first.)

At the 'Welcome to Setup' screen, press Enter. The R (repair) option takes you to the Recovery Module, which is useful if Windows won't boot, but it's no help with a reinstallation. Soon you'll be told that there's already a Windows installation on the computer. Press r for a repair reinstall or Esc to begin a complete, destructive one. For a complete restore, select your C: partition and press Enter. When you get the warning that says an operating system is on that partition, press c. When you are asked your partition preference, select Leave the current file system intact (no changes). When you're told that a Windows folder (or Winnt folder for Windows 2000) already exists, press l ('ell') to delete it and create a new one. Follow the series of prompts. When the installation program asks for your name, enter temp.


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