How to first boot cd rom of presario 2100

Please state exactly what you want to do in more detail. "How to first boot the presario 2100" is simply too vague to understand.
 
Hi i have the same problem, trying to install xp on a presario CQ70 there is now ubuntu on it(but the girlie does not really like is :)

so i set cdrom to first boot.... reboot... hit the f9 for bootoptions.. and then the cdrom... well it just boots ubuntu after that, seems like it is secured for cdromboot 🙁

kind regards
 

so tht i can install an os of window 7