Sorry to hear that the driver update didn't work Donna
Please be sure that you have tried Peru's suggestion of trying headphones or different speakers, just to be sure it isn't a problem with the speakers or cable rather than anything else. Also, please make sure the speakers are turned on and plugged into the correct jack on the back of the computer
If after that nothing is still working correctly then follow the instructions below...
Next thing you can do is go into Device Manager and uninstall all audio devices, then restart your computer.
Windows will automatically install the audio devices again with the best driver and hopefully fix the issue.
This can't make things any worse than they already are.
If you still don't have sound after that then there isn't much choice but to take it to a repair shop or get on the phone with HP support. Is the computer still under warranty?