Here is the Product Specifications page for the computer. It is definitely a vialble model.
The only suggestion that I have for you is, do a full System Recovery. This will eliminate any possible glitches that may be in the system.
For future reference, please don't wait so long to bring what you perceive to be bad performance to someone's attention. After 2 years it is impossible for HP to let you return the computer.
Please click the Thumbs up + button if I have helped you and click Accept as Solution if your problem is solved.