Did it. The quick scan found no malicious items.

While everything else seems to be back to normal - as in I can update Malwarebytes and AVG - the volume icon has disappeared from my TASKBAR. When I go to it manually I find that the pin to taskbar box is already checked. Restarting the computer doesn't help. Not only that but the volume doesn't completely work. My VAIO screen makes its normal sound when rebooting, but Windows does not. Windows Media player works, but NOTHING online (YOUTUBE etc...) does. I can watch, but no sound.

Everything in the Sounds and Audio box seems normal. Nothing is muted. This started last night.

What now?Right click 'My Computer' on the desktop and select Properties > Device Manager.

Right click the sound card driver and choose to Repair or Roll back. If neither of those work then choose Uninstall. Restart the computer and Windows will re-install it automatically.Under System Properties > Hardware > Device Manager the only thing close to sound card driver is Sound Video and Game CONTROLLER. When I click on this I get a bunch of options - the audio ones are legacy audio drivers, audio codex, and realtek high definition audio. Which one of these should I be focusing on?

When I right click the realtek high definition audio it does not give me the option to repair or roll back. My options are update, disable, scan for hardware changes, and uninstall.

Am I in the right place? Is realtek what I want?

Thank you!Is there a (+) that you can click to expand a list of more options?

Expand that and SEE if there are any yellow question marks. If not then use repair or roll back on each one If that doesn't work use the Uninstall option.No + sign or yellow question marks. I did try and rollback the items to no avail. However, a system restore cured my problems. Volume icon back in the system tray and sound is working for everything. Yay!

Thank you so much for everything!