Was it a hosts file such as this one?
The best way is to block the server from tracking you in the first place
Blocking Ads with a Hosts File and AdShield. Under the Security Tab download
the hosts.zip file.
http://www.mvps.org/winhelp2002/hosts.htm
Look for this tool if you wish to keep the for blocking add when you want.
You can use a simple batch file to rename the HOSTS file "on-the-fly".
Download: RenHosts.bat [right-click and select: Save Target As]
If you downloaded a program then disable it from the start up tab.
Execute MSCONFIG from the Start/Run menu and look in startup.
Emillia said:
I made a mistake and downloaded something from a web site.
Now advertisments on the internet won't display. All I get
is a box with the x on the upper right hand corner.