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Thanks for the update. Glad you got it fixed.

I'd say it may be time to start investigating the hardware. Unfortunately, that will require some disassembly of the laptop.

Links:

http://www.pcworld.com/article/249870/create_a_bootable_linux_flash_drive_in_three_easy_steps.html

http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows
...

The speaker(s) is/are unlikely to have failed. If anything, there may be a loose connection somewhere in the wires that go to them, especially if the headphone jack is still working. To eliminate...

When was audio through the speaker(s) last working? Have you updated anything since then (Microsoft updates, etc.)?

Possibly useful links:

https://www.wiknix.com/sound-not-working-in-windows-8-1/

https://support.microsoft.com/en-us/instantanswers/a183aa8b-0eac-4566-867a-98d2761a770d/fix-sound-problems

What version of Windows are you using?