"to protect PC from dangerous software and programmes"
To be slightly more indepth without being complicated, Virus protection softwares tend to scan files on your computer, and use a variety of methods to indicate possible infection, such as Virus signatures of known viruses, new viruses are constantly being released so it is important to keep these upto date.
Uninstall the virus protection. (Some are notoriously difficult to get rid of).
anti-virus
"The McAfee virus protection software is as effective as other major virus protection software brands, and offers many typical features, such as firewall protection, e-mail filtering, and website security checks for safe internet browsing."
We need virus protection software to safe your PC from Online and Offline threats.
Information on downloading virus protection can be found online from many virus protection related resources. Some examples include PCMag and Gizmodo.
One can find reviews on virus protection programs on the official websites of the virus protection program providers. In addition, one can find reviews on blogspots.
Windows Live OneCare has Anti-virus, firewall, spyware protection
It is important to have virus protection on your computer so it doesn't get taken over. Some new computers come with a virus protection program installed, but this is not universal, so you should make sure.
Many websites allow one to download AVG virus protection for free. Websites such as Download, AVG, and Yahoo! Downloads allow one to download AVG virus protection.
That warning means that your virus protection is turned off, not longer up to date, or you have none installed.
Windows and download.com both provide effective virus protection for free.
a virus that is affecting many computers just get protection