I've had enough, please help.

[Guardian]

Ok so, when I first got my laptop I was able to run Crysis smooth as at around 60-70 FPS, not a problem.
But now when I play it, I get about 30 seconds into a game and it starts spazing, I'll get like 1-1.5 seconds of smoothness, followed by 1 second of frozen on 1 frame, and it just repeats for ages. I used to be able to wait for like 15 seconds and it would go away. But now it doesn't seem to want to.
The FPS don't show any drop in r_displayinfo 1, but it makes it impossible to move, like having serious lag. (it's not lag, it happens on LAN)
This problem has also started occurring in Minecraft, if I hit f3 the little graph thing (I think its CPU use) goes from the green, spikes to the top of the screen the goes back to the green again, with the same 1-1.5 second smooth then 1 second freeze pattern.

I would sort of understand it if this was for all my games, but it isn't games like BC2 don't have this problem.
I'm going to uninstall Crysis and reinstall it to see if that helps.

I have a Duel core 2.3 AMD processor, I know its shit but it still shouldnt be this shit.
4 gb ram
2 gb graphics
and 312 gb free space on my internal hdd.

Any help would be amazing.

Edit: If anyone has a good free replacement for AVG and thinks that would help, t'would be cool thnx.

[Amit]

AVG free gets the job done. Defragment your hard drive. See if that works.

[Guardian]

Last time I check (which was about 2 weeks ago, the problems been round for months) it was 0% Fraged.

Edit: Ill do another after the reinstall.

[Mr Buckshot]

Also check your version of catalyst, some of the updates between when you got your laptop and the newest updates currently available may be messing around with the GPU usage (I had some issues like that with a mobility 5850, the latest catalyst seems to be stable but earlier versions had forced me to roll back before).

[Guardian]

I managed to fix the problem with Crysis by having a fan blow on my laptop. But the Minecraft problem is still there, so I'll try what you said.

[Mr Buckshot]

Another thought, is your control panel power saver set to Maximum Performance? Sometimes it doesn't revert to that if you've switched to from battery mode to wired and can cause low performance since it would have underclocked everything.

[Guardian]

I changed the power settings and it seems to have reduced the problem, thanks to all of you.

[Amit]

Yeah damn laptops. I always have my laptop set to Maximum performance so it doesn't reduce my CPU performance. I don't always unplug, but when I do, I prefer dos equis "maximum battery life."

[Timo]

Get Microsoft Security Essentials, it's really lightweight and stays out of the way.

[Amit]

And it's free.

[paladin]

Too much porn. Porn ruins computers....