Recently I purchased Black Ops 2 off steam and when I first played it for a few days the framerate was great and I was running on max graphics settings with no worries but in the last day or two the performance and frame rate of the game has decreased and I have no idea why (Possibly a wrong system update or graphics driver I installed?). I would update the graphics cards but I would want to make sure that I was getting the right updates and everything I need. Could someone please suggest some updates/downloads I should get and what action I should take in order to restore the initial performace?
-HP Pavillion dv6 3204ax
-AMD Phenom II N870 i3 processor 2.30GHz
-64 bit Windows 7 Home Premium
-Switchable Graphics ATI Mobility Radeon HD 6550M + ATI Mobility Radeon HD 4250M with AMD M880g Chipset