After I play for as certain amount of time the game will freeze usually during a cutscene and then stop responding. This is every time I play. It even froze once while I was quiting the game. I couldn't ctrl alt delete and had to restart the computer. Solutions?

I have already done the well Known solutions.

AC3 is a really enjoyable game, but it has some flaws.

I don't know about the PC version, but on the PS3 the frame rate drops drastically inside Boston and New York.

Both Boston and NY seem lifeless to me when compared to Florence and Rome and the horse controls have to be fixed in future AC games by Ubisoft.

Already did the game cache thing. 

PC is core-i5 3570, gtx 570, 6 gb RAM

pc digital download. I will try again soon.