Difference between webkit and rootkit?

What is the difference between a webkit and a rootkit?  When I opened Safari a few days ago, I think I should have stopped and opens too quickly because I got a message that it could not open, but I don't remember if she says a webkit or because of a rootkit.  What I've read, a rootkit does not sound good, yet if this was why he was telling me?  A little confused (and have OCD on stuff of security with computers).  Have MBP of 2009 with BONES of Yosemite.  Thank you.


WebKit is a standard set of libraries to develop and deploy Web applications. In other words, a programmer what to use to get stuff appears correctly in a browser. It is part of an operating system or can not legally be added if desired.

A rootkit is a set of programs and libraries that criminal substitute Internet savvy can use to take and keep control of your computer, usually without your knowledge or your consent, in order to exploit it for their illegal businesses. As the theft of your identity, money, the data and reputation, use it to do the same for others, etc. He is surreptitiously installed on your computer by the unbelievers when they violate its security components.

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