A Fake Virus Scam
Some Fake Virus Scam Telephone Numbers
Although most Fake Virus scams claim to be from Microsoft, it can hit any platform including Windows, Linux, Mac, Android, and OSX. The fake virus enters the computer through a compromised web page and freezes the browser and exhorts to call a toll free number. The toll free number operator then attempts to gain control of the computer in order to "remove" the virus and charge fees ranging from $200 - $600. Two quick lessons. Only let people you trust to have control of your computer. Don't call the fake virus phone numbers unless you are bored.
On Windows and Mac computers, one must kill the browser which has become frozen. On Windows computers, hit CTRL+ALT+DEL, choose task manager, find the frozen browser, and hit "kill task". On Mac computers, hit CMD+Option+ESC, find the frozen browser, and hit "Force Quit". Reinitiate the browser. If there is an option to restore tabs, respond negatively.
Another option to restore options is to reboot the computer. On Android and OSX devices, reboot is the only option.