problem booting from cd

[Sentenielle]

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hi everyone,

i have a problem that i cant fix on my own. need help pls.
i have win xp installed on my pc, wanted to install win 7 instead and also format my disk.
as i started to do so, pressed f12 on start but it says to select the boot device (although my primary boot device is set to cd rom), and i cant do nothing have to restart.
after that i thought that maybe i didnt burn the cd right, so i inserted my original win xp cd but the same thing happened.
if anyone knows what i can do, help please
thanks

[Calvin K]

You should only set the boot-sequence, not the bootable device(s). When you boot from a CD, what you're actually doing is running your computer with a small operating system that's installed on the CD. Check that all cables are properly connected on both drive- and motherboard-side.