You need to enter the computer's BIOS before Windows attempts to load. In the BIOS change the boot order to set the CD/DVD drive at the top.
Each computer make has different methods for accessing the BIOS. I found this for another type of HP machine, so maybe that's the same as yours;
"If you want to go into the Setup program, press the [F1] key after the Hewlett-Packard logo screen
appears but before the system begins to start Windows. Once the power button has been pressed, you
have about five seconds to press [F1] to enter Setup before the boot process continues."
My daughter's HP 1.3 won't start. I get the "windows failed to start" screen. If I hit start windows normally or start windows at last good config, the computer will freeze, even the count down stops. If I hit safe mode the screen will display
then scroll thru more than a page of drivers, then freeze.
I tried using my windows xp disc as a boot disc, but it won't boot off the cd drive. I tried a different keyboard and mouse. I check all plug connections at hd, mb. I check all voltage, all ok.
Any help would be appreciated