The best upgrade you can buy for a laptop is to replace the hard drive with a Solid State Drive.
This is an electronic device with no moving parts which speeds up your strtup and access times by an incredible amount. It uses far less power than a hard drive so it also makes your battery last longer.
Airedale Computers has a fantastic offer for you.
We will take out your old drive and fit it into a caddy so you can plug it into the USB on any computer and you can access all your documents and photographs. We will ghost the drive onto the new SSD and fit it to your computer.
All this for just £79.99
(add £20 if you need a full wipe and reinstall)