Sound problem in windows 7?

There's sound in windows 7… But i have to go to control panel--> Hardware---> sound --->Manage audio devices every time when sound is gone… And sound goes rapidly sometimes and so it's so difficult to manage it… And sometimes sound goes when i play something in chrome. Why is this?
My Laptop brand is lenovo and it's new.64 bit OS and 2.00 GB ram. Please answer this…

There are a number of tips to solve the sound problem in your in system.

1- You might have to check whether the sound cards are properly connected to your system.
2- Then check whether the sound drivers which you have installed in your systems are compatible with your Operating System.
3- You would also have to see whether any registry files are missing. The updating of the sound driver software is also important.