A customer reports that after a technician cleaned up a rogue antivirus program, the customer
cannot browse the web. Which of the following should the technician check to resolve the
situation?

A.
Browsing history

B.
Firewall settings

C.
User privileges

D.
Proxy settings

Explanation:
http://windows.microsoft.com/en-us/windows-vista/change-proxy-settings-in-internetexplorer