I have some sort of virus that has a loud alarm buzzer sound asking to call this tech support number Any ideas how to get rid of it?

Are you seeing it in a web browser or is it application?

Did you perform full scan or quick scan?

Try download Process Explorer and then unzip it and right click and run as administrator:

https://technet.microsoft.com/en-us/sysinternals/processexplorer.aspx

You will see list your process , if you see any suspicious process right click and submit to VirusTotal, you may also select to send all to VirusTotal to find suspicious file, if you find it, right click and find the location and zip the root file and then submit it to Microsoft Malware Protection Center:

http://www.microsoft.com/en-us/security/portal/submission/submit.aspx

Use the Task Manager to exit the browser. Reboot and see if the pop-up goes away.

  How to Use the New Task Manager in Windows 8 or 10  

http://www.howtogeek.com/108742/how-to-use-the-new-task-manager-in-windows-8/

  How to Use the Task Manager in Windows 7  

http://windows.microsoft.com/en-us/windows/end-process#1TC=windows-7

  If the problem persists, for any browser:  

  Remove Tech Support Scam pop-up (Call For Support Scam)  

  [http://malwaretips.com/blogs/remove-tech-support-scam-popups/](http://malwaretips.com/blogs/remove-tech-support-scam-popups/)  

  And see:  

  PSA: Tech Support Scams Pop-Ups on the Rise   

https://blog.malwarebytes.org/fraud-scam/2014/11/psa-tech-support-scams-pop-ups-on-the-rise/

  See this post by GreginMich  

http://answers.microsoft.com/en-us/protect/forum/protect_other-protect_scanning/1-888-2361-scam/0990122e-61a9-431b-947e-a904c202fa7c#LastReply