In case you don't know, its not you, nor it's your system. It's the game! A lot of people are having the same problem like you. Treyarch released patch 1.03 in hopes of fixing these issues, but as I see it, it didn't fix a damn thing!
If I were you, I would wait for an update or patch 1.04. It's a great and fun game to be honest. Just sit tight and hope for patch 1.04 to come out soon.
I haven't played BO2 in like six days now. Had to reset my PS3 three times. After third reset, I basically said "F***k this!" Currently, I'm playing other games without any freezing, crashing.
Yeah Me too, still have this problem =( Hope the will fix it soon, even the new patch didn't helped but Activions said it by themselves that some people even after patch will still have these problem =(
Hope they will fix this soon =)!