|If you can't boot into the BIOS or directly to the optical drive then nothing about safe mode or any drivers is going to help.|
Boot into the BIOS and verify all of the drive controllers are enabled.
What type of Windows 7 disk are you attempting to boot to? If it is a restore type disk then there may be a different method to access that disk.
Try downloading Linux puppy from a computer with disk burning capabilities. Make a CDR of Puppy from the downloaded ISO and then try to boot the Packard Bell from that Puppy disk. That will tell you if you really have a problem.
In the meantime download SIW free from the link below. Use it to determine your hardware specs and post them here. I am looking for the type of drives (hard and optical). Look in the hardware> storage area.