Computer not running games like it should

[RossH]

Hello,
My computer has - recently - not been running games like it should.
When I play games such as Diablo 3 It won't run at as high an fps as it should and will lag noticeably when moving from area to area taking a much longer time that it should to load.
I also was trying to play the game Runescape and it would not work at all because it would freeze and not work. I don't understand why it isn't working properly and I'm not very

Computer Specs:
Acer Aspire 5755G
Intel core i5 2450M 2.5GHZ
Nvidia geforce Gt 630M with 1GB Dedicated VRAM
4GB DDR3 Memory

 

[RossH]

If someone could help me out with what steps I should take to rectify these problems and identify the cause I would be very grateful. Thanks

 

[fkr]

check your temps. maybe you just need some compressed air. also check you tak manger for other things running.

have you updated any drivers lately or made any other changes

 

[RossH]

Not many other things running that would be a problem. Updated my graphics card driver to see if that would help but to no avail

 

[fkr]

are your temps okay. do you have a power setting on that caps your CPU. do you ever run some cleanup software like ccleaner or when is the last time you did a defrag.