To deal with the failed ewf function after Norton Ghost cloning, you should keyin the command below

C:\rundll32 ewfdll.dll,ConfigureEwf Notice: the “ConfigureEwf” parameter is casesensitive.

Then the ewf will re-initialized after rebooting. Check the state, by using check command like C:\ewfmgr C:

Source: http://www.pcreview.co.uk/forums/thread-523966.php