The virus that effect the operating system are ______.
The virus that affect the operating system are system infector.
A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be "infected" with a computer virus.
System infectors:- This category of virus deals with the components of the system itself. System infectors attach themselves to a file such as COMMAND.COM or other memory resident files and manipulate these files. System infectors differ from boot infectors that system infectors gain control after the computer is booted and infects a hard disk or bootable floppies which contain system files only.