WARNING:It's important to bear in mind that no antivirus is infallible and that the risk of being infected can always occur. Remain vigilant on the Internet and don't click on every link you see. Make sure a site is reliable.
An emergency kit for your PC.
Check your router, your PC or even if your identity has been leaked on the Internet.
Check the reliability of a URL or downloaded document.
Anti-virus scan.
Protect your USB sticks and your PC against viruses.