Hello Cecil,
This usually happens when there is an adware installed on your PC.
AVG programs are capable of detecting and removing the malware programs, however there are numerous number of malware programs emerging day by day and we are working 24/7 to add all those definitions to our database.
Do you get this while browsing?
Cecil,
What you’re describing is most likely just a generic Tech Support Scam page.These malicious webpages don’t actually download any file based malware, they just lock up your browser with an onboard script that reloads the fake alert dialog every time you click on the OK button in order to close it. So if you just end the browser process with Task Manager (Right click on Date and time from System right bottom corner tray and select start Task manager ), and then go directly to your home page when you restart Internet Explorer/Google Chrome, the page won’t be reloaded, and neither will the malicious script and you shouldn’t have any more problems with it. If the issue still persists, please reset your both browsers (https://www.howtogeek.com/171924/how-to-reset-your-web-browser-to-its-default-settings/) and reboot your computer once.
Best regards,
Alok.