SteveB wrote:
If you have a dremel tool you could cut a slot in the head and take it out with a flat blade screwdriver.
This ^^^
I have done this myself to extract stripped out screws.
Very very carefully cut a slot into the screw head. You will need a very fine cutting bit on a dremel and a steady hand so it doesn't walk all over the place.
And a small shop vac to get all the filings out. Use painters masking tape to cover over any vents, slots etc that go into the back of the computer. You don't want even a spec of this inside. Take the battery off first.