If you received this error after uninstalling any application that takes over the HTML open command
(including, but not limited to, Chrome & Firefox browsers) you may also need to change the HTM/HTML association in the registry.Start, click Run, type Regedit in the Open box, and then click OK.
Browse to HKEY_CURRENT_USER\Software\Classes\.html
Right click the value for the .html key and select Modify...
Change the value from "ChromeHTML" to "htmlfile" (or from FireFoxHTML to htmlfile)
Repeat for .htm, shtml, .xht, .xhtml, .xhtm keys
Repeat these steps for htm and .shtml keys if they exist.
You may also want to check the xhtml and xhtm keys.
If you recieve:
Error message when clicking hyperlink in Office: "Cannot locate the Internet server or proxy server"
The easy fix will download when clicking here.
Just run the file and it will fix the Cannot locate the internet server or proxy server error message.