* Call a PC guru

* Don’t shut off your PC which could trigger the infection.

* Disconnect your online connection.

* Back up any new data, it might be your only chance. Try to clean it later.

* Use another PC to learn about the virus.

* Employ anti-virus software to scan and clean. If not treatable, delete the file.

* Brief your anti-virus software vendor, in case it’s an new virus.