The ability to manipulate

Routine (routine) owned a virus will be run after the virus 
infect a file. The contents of a routine this can vary from that is not 
dangerous to do the demolition. This routine is generally used for 
manipulate files or popularize the author! This routine utilizes 
ability of an operating system (Operating System), that have 
the same ability with the operating system. For example: 
a. Create an image or message on the monitor 
b. Change / change-change the label of each file, directory, or the label of the drive in your PC 
c. Manipulate files that be infected 
d. Damage to the file 
e. Disrupt work printer, etc.