You can find it either on your computer's manufacture website such as Dell, HP, Sony, IBM and so on. Or on the sound card manufacture website.
sound driver for windows 7
Because Windows 7 does not support your sound card. Try to find drivers for your sound card compatible with vista (x32 or x64 depending what you have). And install the driver for Vista. You can choose compatibility mode to the driver too.
You need to install driver for your sound card.
Yes. You need to find and download a driver for your sound card. Since we do not know what sound card you have in your computer, we cannot provide a link to a download for it.
After Vista, Widows is going to release their new OS, Widows 7. Windows 7 will debut sometime late 2009-2010.
You probably have not installed a driver for your sound card.
No, I didn't.
The most likely cause for sound issues on a computer is a problem with the driver. If you update the driver software for your sound device your problem might go away.
A driver is always required to use the sound card. Depending on the age and popularity of the card, Windows 7 may include a driver for the card, so that one does not need to be installed manually.
yes
Search from startmenu: Devices and Printers and/or Device Manager
You need to install appropriate sound driver for the card. Use the laptop manufacture website (Dell.com, HP.com and so on) to find what you need.