How do they work?
These popups work by baiting you into clicking them either intentionally or accidentally. Once you have done so, they begin installing software on your computer. Never, ever, run this software. Just delete it and then empty your trash can/recycling bin that can usually be found on your desktop of all their files. Because if those files are allowed to run, you never know what they will do. Some could be seemingly harmless but contain a key-logger. This would make it easy for someone to sneakily steal your usernames and passwords to your accounts. The damages could in some cases be immediately obvious, it could wipe your entire PC with no way for you to stop it.
How to remove one?
The best way to close a popup, safely, is to use windows task manager. You can do that as follows: Click ctrl, alt, delete. Find the popup in processes and force close it. This is the best way of closing the popup because you never have to click on it. If you do find yourself with one installed, it is vital to use a virus scanner to detect any files and delete them. You can delete them manually, but you may miss something that has been intentionally hidden.
TotesNewsworthy Special Scam Tip: Never Call the Number on the POP-UP. Take your computer to a local store.
How to Avoid Them:
The best way to avoid these scam pop-ups is just to use your common sense about the sites you visit. If you do happen to bump into one, always close it using the task manager. But the absolute best way of avoiding them is by using an adblocker. There are plenty of free adblockers in the google chrome store you can download as an extension. Once downloaded, it will hide all ads on the page, or in most cases, not allow them to appear in the first place. This doesn’t just stop pop-ups; it prevents any form of advertisement that a website has. Which will make your whole browsing experience much more enjoyable.