New
#11
Those users you see that aren't you are logically "virtual users".
Your computer is like a virtual reality that is settled in the very wild forest. So that not just anyone, or anthing, can simply change your important files and ultimately destroy your PC, your computer has those users.
SYSTEM is basically your own computer. Specifically, Windows.
Guests is everyone not registered to your computer and it also incldes the Guest Account.
Administrators include administrator accounts which may also include you.
Administrator includes the one and only boss account which is hidden by default. It is also referred as the true administrator.
Users include ALL user accounts you have created.
Everyone- this is self explanatory.
Now you might be asking yourself "I'm an administrator, why the hell does it ask me for permission?!"
Well, the reason for this is viruses can trick you so they would run under your name which can be devastating if you have full rights. So to be safe, you're treated as an ordinary user. The UAC prompt just basically confirms that you want to do what you think you want to do.
Note: The Windows and System32 folders are very well protected and is basically locked down from any modifications. There is no reason for you to modify these files.
I'm not one of thsoe security fanatics, but I would highly suggest you keep UAC on.