Fallout New Vegas has stopped working

Hello,
My problem is really lying me down. When i am playing the game, the game is suddenly stopping down. This thing is happening after i play the game for about an hour or so. It stops for about 1 to 2 sec and then again works normally. I want to tell that is this a serious problem which i am facing. I am not getting any solution for this ,so i require your help on this issue. I hope that you will be able to provide me the same.
My system have the following configuration-
4 GB of RAM
Intel Core i7-740QM Processor
Radeon HD 5730

I have tried the following things and it is working well for me .

• First try to make the settings low and select the resolution as 800x600.
• Through steam you will require to very the game cache.
• To the Fallout NV folder you need to add the .dll.
• After that you have to restart the system.
• After restarting the system you require to install the latest graphics drivers on your system.
• Now delete the entire games from the hard drive
• Now re-download it.

Your problem will be solved.

Try the following steps -
1-Go to the Control panel
2-Then you need to go to Programs and Features
3-Then select uninstall k-lite codec pack
I think that trying this will help you in your game problem. If you want further help, then you need to reply me back.

Even i was facing the same problem on my system with this game. I have tried the above solution given by Brunoz . When i completed the instruction then i tested the game and i founded that it was working well. I have also tried the solution given by vandam. Even his solution was working well on my machine. Now i am very much happy as it is solving my issue. I will like to tell even others to try this issue as it is really a nice one. Finally i thanks to both of you for providing me the solution.