There are several ways. One good way is to go to Control panel->User Accounts, and simply view your User, you'll either have Administrator rights or Standard User rights. For most home users that's the only 2 choices. It turns out there are 3 flavors of Admin rights above the one you have, but it takes expert programming skill to access and use those. There are very few legitimate reasons why you would ever use those unless you are programmer or a web-developer.
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