No one should use an administrator account while connected to the Internet.
Why you should not run your computer as an administrator
Running Windows 2000 or Windows XP as an administrator makes the system more vulnerable to Trojans, viruses, spyware and other security risks. The simple act of visiting an Internet site can be extremely damaging to the system. An unfamiliar Internet site may have Trojan code that can be downloaded to the system and executed without any intervention necessary from you. If you are logged on with administrator privileges, a Trojan could do things like reformat your hard drive, delete all your files, create a new user account with administrative access, steal your banking records and passwords, etc.
You should add accounts for all users to the Users or Power Users group. If you need to perform administrative tasks, such as upgrading the operating system or configuring system parameters, then log off and log back on as an administrator.
If I had someone who shut off the firewall while using my computer they would be denied further access to my computer the first time I caught them shutting the firewall or av program off.
An administrator has access to everything on the computer if they know how to access it including your personal files.
The only firewalls I know of that cannot be altered by someone with an administrator account are hardware firewalls because they are separate from the system and are configured with their own access passwords.
There may be some commercial software firewalls that limit access as well - I don't know.
Edited by Enthusiast, 11 October 2006 - 06:33 PM.