How to format windows if its in installation?

[brisk]

Yo

Im trying to format my old bros pc but when i just boot off the disk is just resumes the current installation of windows. We do not want the version as its old and we want to install sp3 which we bought yesterday. Also becuae we lost the cd key for the sp1 one and we cant find it anywhere and continue to get to windows then restart like a normal edition.

hmm what to do.

 

[brisk]

like it just resume the stage 3, isntalling windows - 39 mins remaining ( the bit you choose your keyboard settings and pc name etc )

 

[pat mcgroin]

when it starts to boot try to press F8 and see if it will give you a option to go to a command prompt.
If it does type format c: