This is a test of commonsense. Complete the next sentence:

How to deal with computer virus infection
Make sure that your antivirus software is the latest update.
If necessary, download the update from another computer and update it manually.
Disconnect from the internet or local area network (lan).
Start windows in safe mode if it is not running (when turning on your computer, keep pressing f8 as soon as the computer starts running, then choose' safe mode' from the menu). Run a full anti-virus scan.