Handling a PC Virus Attack - Breathing Space Blog
* 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.