How do I get out a completely stripped out Philips screw from laptop?

How do I get out a completely stripped out Philips screw from laptop?

I have two Philips head screws on the shell of my laptop, I got one out with ease and the other I could not get out. I tried and tried, I tried using different sized screwdrivers, using a rubber band, and other methods and through all of this the result is a completely stripped screw. I would like to remove it so I could swap out the hard drive before college. Thank you for your help.