Laptop OEMs (especially) are known for tweaking chips and drivers. So never be surprised if you get a driver elsewhere that does not work. Best to get it from the computer OEM - not the chip supplier. Toshiba is known to offer new drivers only when there are bugs in the existing ones. So don't expect them to arrive often. Try using the device manager approach described by Intel.

You might be having issues with the Realtek Audio Driver. Try uninstalling it, and reinstalling the driver to fix the issue. You can download the driver at the Toshiba Support link. If you need further help, please look at the troubleshooting page.

This seems like it could be a problem with your recovery program, or disk. One way to fix the problem would be pressing down the "0" button while turning on the computer, and follow the prompts. For further assistance, you can reach the Toshiba Support line at (800) 457-7777 (toll-free). You can also use the troubleshooting page for more assistance.