What looks like the highest permission level is actually just one step below.

User Account Control (UAC) helps prevent unauthorized changes. We don't recommend switching it off. Using the Control Panel leaves little room for error vs. editing ...

You would encounter this error message when trying to launch some programs. The causes include UAC being temporarily or permanently disabled. Also, pending updates ...

A pair of Windows bloggers posted more proof-of-concept code today that subverts an important security feature of Windows 7, a problem that Microsoft knew about as long ago as last October and that ...