You did not list your operating system. What operating system are you using?
https://blog.malwarebytes.org/threat-analysis/2014/11/psa-tech-support-scams-pop-ups-on-the-rise/
Any new browser extensions or items in startup that you need to disable/remove?
Were you using Chrome? How to reset Google Chrome settings
You may want to use https://www.google.com/chrome/cleanup-tool/
Recommend you try the steps in this free multi-step removal guide from Malwaretips.com: https://malwaretips.com/blogs/remove-random-audio-ads-virus/
If you do not see the program in Control Panel that you think may be responsible for the issue or you cannot uninstall it, then move on to steps 2 and 3 (scan with AdwCleaner and Malwarebytes Free). You may not need to use Hitman Pro (Trial Version) as suggested in step 4 but you may need to reset your browsers (step 5).
https://malwaretips.com/blogs/reset-internet-explorer-settings/
https://malwaretips.com/blogs/reset-chrome-settings/
https://malwaretips.com/blogs/reset-firefox-settings/
http://www.howtogeek.com/237527/how-to-reset-microsoft-edge-in-windows-10/
Or
Try scanning with the Emsisoft Emergency Kit and/or the Eset Online Scanner and TDSSKiller:
http://go.eset.com/us/online-scanner
http://www.bleepingcomputer.com/download/tdsskiller/
Good luck…