If you received this error after uninstalling Chrome (or Firefox) browser you may also need to change the HTM/HTML association in the registry.
1. Start, click Run, type Regedit in the Open box, and then click OK.
2. Browse to HKEY_CURRENT_USERSoftwareClasses.html
3. Right click the value for the .html key and select Modify…
4. Change the value from “ChromeHTML” to “htmlfile” (or from FireFoxHTML to htmlfile)
Repeat these steps for htm and .shtml keys if they exist.