purewise2 wrote:
yes ty ESC is the Key, but i got another question,
when boot menu appear i choose boot manage but nothing hapening and win8 poping up !
there is no cd-drive option to choose.

Sounds like you saw the boot menu with the 'ESC' key, but you probably need to change some bios settings first before you can see more options to boot from CD/DVD.
Windows Boot Manager on your hard drive is just a fancy name for Windows 8 in this case, so if you selected it, that's normal that Win8 boots up.

Anyway, if you can get into the bios, be sure to enable the 'Launch CSM' setting under the 'boot' menu to be able to boot to CD/DVD the next time you try the 'ESC' key.
If you don't care about the 'Secure Boot' setting found under the 'security' bios menu, disable it too although I'm not sure if it's realy necessary.
I usually disable both to boot to CD/DVD though.
Save your bios settings and you should see more options the next time you try to boot to CD/DVD (insert the bootable CD/DVD before you access the boot menu too).

If you prefer, you can also try to change the boot order in the bios as Zygomorphic mentioned (after changing the bios settings mentioned above), but sounds like you were trying to avoid this in your first post.