A Rootkit is a type of software that can be legitimate or illegitimate.
Legitimate rootkits are usually very important to your computer and allow them to operate successfully.
Malicious rootkits are designed to render common security operations useless and to hide other malicious processes from normal detection!
In addition to this, a rootkit may be used to make copies of sensitive data (such as passwords and account login credentials) and send the information to hackers on another computer.
A rootkit is often found deep in the computer system, giving it specialised access to computer settings and software.
A rootkit is often very difficult to detect and remove.
Removing a rootkit can cause undesired effects to your computer system, including computer crashes, BSOD errors and system failure! Removal of a rootkit is a very dangerous and difficult procedure and is not recommended to inexperienced users!
However, allowing a rootkit to operate in a system without taking action upon dealing with the problem is not recommended.
Many computer experts believe that the removal of a rootkit is either not possible, unpredictable or too dangerous a risk to take, and therefore may choose restoring their computer settings through a backup over attempting to remove the malware.
Nevertheless, a rootkit is a preventable and removable entity that you should never give in to!