I had to grin when I read you formatted the computer, but I know better. Since this is the Win9x forum, I assume you used a CD for putting the operating system back on the formatted drive, but I don't know what that CD was -- a restore from some manufacturer, and OEM, or a Microsoft -- which matters. However, the bottom line, other than using a manufacture CD like Compac/HP, Dell, etc., is that no device drivers are furnished and it is up to you to make things work. We wouldn't know how from here since we don't know what devices are there that need drivers. In order for this to be done, you must identify them and go shopping.
I have reformatted my 'puter and now cannot get sound. What do I do. Have tried everything I know. I had sound before HELP!