Personally, you met a fakealert, which was hosted on amazon.com. E.G., the below FAKE MS site.
Then, if I may ask:
Were you using this site [couch-tuner.ag] when you encountered the FAKE pop-up? If so, I kindly recommend:
running Task Manager (right-click on yr taskbar) to force any other FAKEALERTS to shut down (this helps avoid data loss)
clearing browsers' temporary data using ccleaner (direct download; no ad...) in time
reporting the domain or URL@ https://safeweb.norton.com/
using other better sites like nbc.com/video. Because that CT.ag contains sponsored yet risky (misleading) ads like the one@ adsrvmedia.adk2x.com/imp?p=70747993&ct=html&ap=1303 re Search By WowMovix
(hitting the above "Skip this ad" will ship the user to the below WowMovix Search)(searchalgo.com, a hidden/risky browser hijacker)
Now U:
Have you updated all of 3rd-party applications, operating system?
Are you using any up-to-date Norton software? If not, get one that works for yr OS here (Up to $60 Off for Limited Time)