How to change hpcomputer sound and tricks

I know that it is important work. If you want Change computer sound ok. There are rule down this proved. Yes it is possible....to change the default start up and logging in sound and you don't need to download any software for that.... just download the sound you like .....that is hello and welcome......now all u have to do is
go to control panel

Windows 7 and Vista

1) Go to the Control Panel.
2) Click the Sounds and Audio Devices tab.
3) Click on the sound you wish to change, the sounds are available and labeled in the box on the lower half of the Sounds control box.
4) Click the Browse button in the bottom right corner of the box.
5) Select your custom sound. The sound file must be on your computer and be saved as a .WAV file.
6) Press the play button next to the Browse button to confirm your sound.
7) Save the Sound Scheme by clicking Save As and setting a unique name.
8) Make sure your sound scheme is selected.
9) Click Apply and exit out the box.

Windows XP

At first  Start menu, select either Control Panel, or Settings and then Control Panel.

Note: Want this doesn't match what you see, refer to About navigation settings in Windows.
Click the Sounds and Audio Devices icon, and then click the Sounds tab.

Under "Program Events", select Start Windows. You can select a sound from the drop-down menu or click Browse to select a .wav file. If you don't want Windows to play any sound during startup, select (None) from the drop-down menu. But it does sound like the sound system is dying. have you tried using a different speaker or headphone?