my suggestion sir is...
heres the steps
1. restart your computer
2. press delete will the windows is black until a certain window will appear
3. go to the second line
4. and find the boot and enter it
5. you will see a sata and a CD boot
6. in the first 1 press +/- sign until it will be the sata will go down and the CD boot will go up...
that my suggestion...
i hope it help you sir..