07-10-2013 10:12 AM
Restart your PC , Your PC must have an active Internet Connection.
While following the KB , Once you Click on Update > If No updates are available for your device model then within that Screen you'll be offered an Option " View Other Version " Click on it . It will show you available versions. You can choose anyone to reload your device software.
07-13-2013 08:48 AM
Have you followed KB10144 ? Desktop Software still don't recognize your BlackBerry ?
Then you can try this KB article :
KB27956 : How to recover a BlackBerry smartphone from any state