Hi Karen :
You should be following the advise I gave at :
http://forum.avast.com/index.php?topic=21578.0 Since you have uninstalled Netdotnet from Add/Remove
Programs, the next step should be using Ewido from :
www.ewido.net/en . Since there is no info from you as to
the presence of an antiSPYWARE program on your computer,
I recommend you use Ewido's "Online Scanner" by clicking
the "Scan now" tab in the upper left-hand portion of the
web page. If this does NOT resolve your problem AND since
Netdotnet is primarily SPYWARE, I would recommend you
ask for help on the forums of your antiSPYWARE Provider;
if you know of none, I recommend
www.landzdown.com .
It appears from the "Error Message" that there is a portion
of Newdotnet on your computer that was NOT removed
when you used the "Uninstall" from Add/Remove .