Since you didnt say what your specs are.
Then you said "working fine, but is getting slow"
That makes me think. You mean that it used to run fast, now its slow.
In that case. Id re-format and re-install. Then youll have the performance you did, when you upgraded.
Now if you mean by "slow" that you cant play newer games, as well.
Then yeah, i need to see some specs :]