Windows 7: PC freeze

During I playing game with full screen mode,suddenly my game were freezing and my speaker release a voice like a radio spike.(bizz bizz bizz)

I was trying to press alt+tab on my keyboard to exit the full screen,but everything were freezing included window task manager.

My friend told me that's hardware issue.

And I'm not sure it's hardware or operating system

How do I can check then solve this issue,for those people had this problem before,please give me some guide and solution to solve it.

Summary of problem : Suddenly the game hang and the speakers released bizz bizz bizz just like a radio spike sound,unable to press ctrl+alt+delete and alt+tab so I dun think it's game problem.

It could be hardware.

It also could be soundcard drivers. I used to get repeating sounds and a hard lock of the PC with Creative Labs' early Windows 7 drivers.