Error Deserializing RevisionInfo.xml?

After an EZ Update, I started receiving this message on our server AND client computers. Any ideas?

Error deserializing revisionInfo.xml file

There is an error in XML document (0, 0).

I'm not sure where to take this...please help!

Frequently Asked Questions: 

1. Shutdown your Navigator Server

2. Restart your computer

3. After restart, click on start, all programs, atp, navigatorVr (don't start the Navigator) and select Navigator Repair tool

4. On repair tool, click on reset button

5. Afte reset, click on the update button and follow the prompts.