I believe you are referring to anti-rootkit software. Firstly, a rootkit is something that allows other threats (eg. viruses, spyware) to hide themselves. (Rootkits are often bundled with keyloggers or trojans.) Therefore, conventional anti-virus products cannot remove them because they are hidden. Anti-rootkit software is designed to remove the rootkit.
A spreadsheet is software.
They are classified as being applications software.
System software,Programming software,Application software
It is a system software.
software
two kinds of software are system software and application software
Yes,you can categorized software like this.
Yes, software engineers develop software.
Software Theft
Software designed for a specific purpose is called application software or custom software.
software
Application software