So sometimes I get clients who have an error the reads as follows:
This can be obnoxious since, as an Admin, I know we don’t restrict hyperlinks. We usually discover that the client had previously install Firefox or Chrome and removed the programs after deciding they did not like how they worked. Typically the programs will uninstall cleanly, but not always. If you are worried about a program not cleanly uninstalling, I recommend Revo Uninstaller to remove programs.
This is one of those times, and the best way I have discovered to resolve it is to go into the registry and dig out the mess that the unclean install has left behing.
Frist thing you will need to do is open the registry editor.

Opening the Registry Editor
Now, select the Find option:
Then search for either “ChromeHTML” or “FireFoxHTML”
When you find one in a key such as “.htm” you will want to change it back to htmlfile. To do that, Right click on (Default).
and choose Modify
Then you will change it to
htmlfile.
Then, press F3 to keep searching. You will want to keep searching until all file types are pointing to htmlfile. If you come across a registry key that belongs to Chrome or Firefox, leave it as is.
Once they are all set back to htmlfile, you should be all set and able to open hyperlinks with out issue.
Let me hear from you if you have comments or questions.





