The game has/uses more resources than the previous version did. If your computer was at the edge of having resource issues, there is a good chance it is now having resource issues.
Pauses and sounds looping are normally attributable to heavy swapping. In other words, the computer is running out of resources.
Reducing the "Maximum Texture Size" to the next size down will normally cure those problems. But, if you are also running with anti-alising being forced on the video card, then changing the texture size may not have an effect.
There is no patch to fix resource starvation. The game has all the controls in it to reduce its own resource usage. You just have to make use of them.
Outside of the game, there is the issue with background processes which can use up a significant amount of resources.