It consists of controlling the system resources first, before any other application, and therefore does not allow itself to be manipulated by other applications. This isolation system only makes sense when the virus is in memory, i.e. when it is active, as this is when we try to avoid the effects of the virus on the system. Be careful when downloading software or other items. Avoid opening files attached to e-mail messages, unless you trust their source. Scan new programs before running or installing them onto your system.
Most programs offer an easy online updating option.
Disinfecting a virus You should never work with a virus in memory. A virus or any other program can only get into memory when it is run. When you run an infected program, the virus is activated, and that is what we want to prevent by booting from a clean, virus-free boot diskette. Some necessary program features A good anti-virus program will check RAM, boot sectors and system files. Legal Disclaimer .