Know what you are doing and want control of YOUR PC back read on.
Vista has a built in administrator that is more powerful then the default one. To enable it right click on Computer from the start menu and select manage.
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Next you can enable this account if you need a real administrator account. Right click on the Administrator account and select properties, and uncheck disabled.
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You should log out at this point. Next log in add administrator and add a password. You can do this in Control Panel by selecting the User Accounts option.
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Now you can log in as a real Administrator, this is called Built-in Administrator in Vista, but I like to call him su (super user). But do we want to use this account all of the time, I would say no. I would want to use the Admin account I made on install or perhaps a new one, but I want it to act like a real super user account. More on that next post.