HP Pavilion dv4000 Notebook "enter 25 digit cd key" Questions

...Enter your 25 digit product key (Windows XP Key) and click next 10) Enter whatever you want for your computer name. It could be "Desktop" or "Laptop" or "Family System" whatever you like. If you're ...

...Enter your 25 digit product key (Windows XP Key) and click next 10) Enter whatever you want for your computer name. It could be "Desktop" or "Laptop" or "Family System" whatever you like. If you're ...

...25. The next screen is of Computer Name and Administrator Password. You just have to enter the Computer Name and leave the Administrator Password Box blank and click next. ...

25 digit number (alpha-numeric) that may or may not have the leters "OEM" in it.If that COA is still attached you can get the OS Media (CD, DVD, or diskettes) and just re-install the Operating System.