The message you encountered with your web browser was a scam
. Closing the web browser and then relaunching it usually eliminates the bogus warning message and is the best way to deal with these scams. If the browser freezes or hangs, you may have to close it with Windows Task Manager by selecting End Task...see Tech Support Scams use new Tricks to Hold Browsers Hostage
. Afterwards, be sure to refresh (clear) your browser's cache.
Cyber-criminals are very innovated...they are always developing creative and more sophisticated techniques to snare their victims into providing personal information or stealing their money for financial gain. They rely heavily on deception and trickery through human exploit/interaction (the weakest link in security
) to target a large audience.
In the majority of these cases the scammers use social engineering
to trick a victim into spending money for unnecessary technical support or to buy an application which claims to remove malware. They typically use bogus error or warning messages
(web page redirects & pop-ups) to falsely indicate that your computer is infected or has critical errors
. This is done as a scare tactic to goad their victims into calling a phony tech support phone number shown in the pop-up alert and allowing the scammer remote control access to your computer in order to fix the problem. In some cases you are instructed to download malicious software which will actually infect your system. If the victim agrees, the support usually costs hundreds of dollars
and often leaves the victim's computer unchanged or intentionally infected with malware.
For more information about how these scams work and resources to protect yourself from scams, please read Beware of Phony Emails & Tech Support Scams
...there are suggestions near the bottom for dealing with scams and a list of security scanning tools to use in case the usual methods do not resolve the problem or you allowed remote access into your computer.