Even more fps droppage?

ur pc is ****, thats all i can say !

Since it's obvious that you're playing with the minimum requirements I suggest on improving your FPS with what you've got.

Reduce your video settings to the lowest possible option; this will disable blood and bullet trails. There will also be a visible difference in the texture but this will help boost your FPS.

In your Windows options (control panel > display), choose to allow windows to operate based on performance. This should also help boost your FPS.

Finally, make sure you have all background processes turned off before you start your game.

clean your PC, delete unnecessary stuff, leave at least a quarter of your HD free :P then defrag

Solution:

Ccleaner = Removes all the unwanted sh1t of your system.
Gamebooster = Shuts all this unwanted programs/applications.

My Computer > Right click > Properties > Performance settings > Adjust for best performance.

Now i get 30-70 Fps in a 5v5.
& 20-30 in a 8v8.

Im getting fps drop too, I do 80fps in a 8v8 but now it spikes down to like 2.1 and back up ;s

i get an average of 12 in a 1v1 and it spiked to 20 ...

oooh so you're the one I put a full clip into from my xm8 and ya turned and killed me !

just kidding (well kind of)
I have noticed a lot more lag problems since the last 2 patches. higher pings and lower fps . I've never had any luck from lap tops. they start off fine but after they heat up a few times they aren't worth a dam. I got rid of all mine except for one I gave to my gf .
http://download.cnet.com/Advanced-SystemCare-Free/3000-2086_4-10407614.html?tag=mncol try using this, it has built in game booster, cleaner, defrag , internet booster,spyware adware remover. works great for desktops to . also do what you can to keep your lap top from overheating. keep a good air space under it . use a small fan if possible. I used a small fan under mine it helped a lot. but in the end I bought a good desktop and been much happier.
good luck