Hmmm, the Anti-virus is just one of the defence software mechanisms to maintain a protected computer.

Save for the odd incident nowadays a potentially lethal Virus will appear.

Now it is mostly the world of computer hackers. The in-thing is phishing; used to acquire personal data from unsuspecting computers by stealth means. Then, there are spywares and adwares that also affect the speed performance of the computer because these soak up the memory resource of the computer.

Aside from the above, the regular computer performance needs to be maintained. The suggested Softwares above are good and reliable. I use them to “clean” up my data and hard disk management.