Instructions on how to disable TeamViewer from listening on Port 80. Instructions are as follows:
1. Open port 5938 (TCP) on your firewall.
2. Change the following registry keys.
* [HKEY_LOCAL_MACHINE\SOFTWARE\
TeamViewer\Version4] Key ’GatewayAllowed’ set to 0
*
[HKEY_LOCAL_MACHINE\SOFTWARE\TeamViewer\Version4] Key ’ListenHttp’ set to 0
After you make these changes, you should no longer have TeamViewer listening in on port 80, killing your local web server.