You are a consumer support technician. After a user installs a pop-up blocker, the user is unable to download new software from the Microsoft Windows Update Web site. The user is also denied access to the Web sites of antivirus software vendors.

The user is able to access other Web sites. You are able to access the Windows Update Web site and the Web sites of the antivirus vendors by using an IP address in the URL.

After you uninstall the pop-up blocker that was installed by the user, the user still reports inability to access these Web sites.

You need to ensure that the user can access all the Web sites.

What should you do?

A.
Remove all entries from the local hosts file.

B.
Remove all entries from the local lmhosts file.

C.
Configure the MAC address for the network adapter manually.

D.
Configure the TCP/IP properties of the user’s computer by using an alternate DNS server IP address.