I'm not sure what is wrong with windows 8 for you. You say it's slower and so on. However. If this is the case. You should look into SSD Drives. Look them up and you will be pleased. Everything in your computer runs faster.
Edit: Link provided
http://ocz.com/consumer/ssd-guide/ssd-vs-hdd
Also look into upgrading your CPU (Look this up). That deals with your computers overall speed.
Edit: Link Provided
http://smallbusiness.chron.com/cpu-matter-67309.html
Edit: Link provided
http://ocz.com/consumer/ssd-guide/ssd-vs-hdd
Also look into upgrading your CPU (Look this up). That deals with your computers overall speed.
Edit: Link Provided
http://smallbusiness.chron.com/cpu-matter-67309.html