My laptop is about 1 year old if that helps and it has windows 7.
Yeah you should be able to hit the Delete key. I don't trust my keys so when I need to get into bios I keep tapping the key a lot of times so it will put me into the bios. Again if you can't get in by that key try the f2 or the f12 keys and do it like the delete key. I hope this helps and good luck on adding more memory.