The only book that tells you about the holes in the Microsoft Windows Operating System AND how to close them up so a hacker can't get onto your system. There are a lot of books out there that just TALK about problems with the Windows Operating System. But there are very few that will tell you WHERE the holes are, HOW to find them, and WHAT you need to do in order to stop them. Based upon personal experience, as hackers attacked repeatedly, how they were found out and stopped. If there is one book you should buy and read - it is this one. Simple, easy to do fixes to the Windows Operating systems from XP to Windows 10. Screen shots on what you should see, where to find it, how to use it. A must have book for anyone buying, using, or planning to buy a Windows computer.