Updating my old laptop
I highly recommend looking at a site like i Fixit to see if they have tear down or repair guides for your model laptop.
I have used this to repair a hard drive in an out of warranty Mac Book Pro 15.
This is particularly true of the smaller systems such as the ultrabooks.
Even though they do not have easy access, some of them may still be able to be opened for repair or upgrades but it requires more work and effort.
For example, if your laptop is unable to play Batman: Arkham City, it may be that you lack the necessary graphics processor, have insufficient RAM, are running short on hard drive space, or are experiencing a combination of all three.