Help, fps/ping issues.

My regular fps (60-100) drops to as low as 5 fps and stays there for a couple minutes and shoots back up for a couple minutes and back down again. soo annoying. dont say get gamebooster or any of that because its not about my computer, its about the game. please tell me if any of you have an actual fix for this. also, ever since i got windows 7 my ping went from 9-12 to 35-60 .. what can i do there? thanks.
And i know the problem is not with my computer for my fps issue because ive never had this problem before and recently had it the last patch or two patches ago.

also heres my computer specs:

windows 7 home premium 32-bit
inter core2 duo CPU T5900 @ 2.20GHz
4 GB RAM
ATI Mobility Radeon HD 3400 Series