This is an indication of a rogue malware infection.
If you are using Windows Live OneCare and you have been infected, but OneCare did not detect or cannot remove the malware, please contact support to report this and for help with removal.
How to reach support (FAQ) -
http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2
If you are not using Windows Live OneCare, you are off topic for this forum. This is not a general forum for viruses, spyware, or Windows Help. For help with spyware issues, you may want to
try the forums here:
http://aumha.net/
For help with virus removal, contact the maker of your Antivirus program.
If you are in North America, you can call 866-727-2338 for help with virus and spyware infections. See
http://www.microsoft.com/protect/support/default.mspx for
details. For international information, see your
local subsidiary Support site .
Self-help may be available here:
http://www.bleepingcomputer.com/virus-removal/remove-thinkpoint
or
http://deletemalware.blogspot.com/2010/10/how-to-remove-thinkpoint-uninstall.html
Regards, Dave