General Failure while pinging any IP

To fix this problem in Windows XP and Vista, you need to edit the registry. Go to Start > Run > type regedit and click OK. Navigate to HKEY_CLASSES_ROOT\FirefoxURL\shell\open\ddeexec. At the right pane, double click the (Default) name to bring up the Edit String window. You should see the data value “%1″,,0,0,,,,. Just clear off and leave the value data blank. Click OK to close the Edit String window.

or

Go to start>run type regedit click ok
Now you need to navigate the following key from left pane
HKEY_CLASSES_ROOT\FirefoxURL\shell\open\ddeexec
Now you need to Double click on the Default REG_SZ registry value from right hand side, which should have a value of “”%1″,,0,0,,,,”. Delete that value and leave it blank.
Close and exit registry editor

or

Open Windows Explorer (or My Computer).
Go to Tools -> Folder Options -> File Types
Select Extension: “(NONE)” File Type: “URL:HyperText Transfer Protocol”
Click “Advanced”. In the “Edit File Type” window, select “open” and click “Edit”
Uncheck “Use DDE” (the dialog should then hide the lower part).
Click OK for that dialog and the next one (afterwards, the “Use DDE” box is still checked but the “DDE Message” box will be cleared)
Repeat for Extension: “(NONE)” File Type: “URL:HyperText Transfer Protocol with Privacy” (and any other protocols you want to fix)
Repeat for Extension: “(NONE)” File Type: “Firefox URL”
Repeat for Extension: “HTM” (or “HTML”) File Type: “Firefox Document”