"All of the above" may not be effective against malware installed deep in the computer, such as in the BIOS as done by Lenova.
Last week, the computer-making giant said it was offering customers a tool to help them remove the pre-installed software after experts warned that it was a security risk.
Accessing Lenova's web-site to learn more is difficult as their site is being "Hacked" (DDoS) at the moment.