“This site is running TeamViewer”
Beware if you decide to use TeamViewer, a remote control app. It appears to launch a webserver on port 80 I think for some kind of NAT/firewall detection. In any case, if your computer is also used as a webserver this will cause a few issues 
The solution I have found (for Teamviewer 5 Windows) is to close the program (right click and exit; make sure it’s completely closed). Then open the registry editor (Start menu > Run > regedit) and find your way to the following registry entry:
HKEY_LOCAL_MACHINE\Software\Teamviewer\Version 5\
and change ListenHttp from 1 to 0.
You must close Teamviewer first, I found that if you change it while Teamviewer is still running, the setting will be reset (back to 1) when the program is next closed.
September 25th, 2010 at 10:20 am
hi
tnx 4 ur nice tip
its usefull 4 me
tnx again
December 27th, 2010 at 2:16 pm
i thank you for your help but i still got a problem. i delete TV from my computer because i dont use it. i just did it because i cant see a webpage and the webpage says: this site is running teamviewer. i still dont know how to see the web page. but you helped me with this thx