"Unable to Start Application. One of the required components may be busy ... please retry."
Corrupt Address book file.
Rename the .wab file or files.
Click on <Start><Find><Files or Folders>.
In the "Named" field type in "*.wab", make sure you are looking in the C: drive and click on "Find Now".
Rename any files with the .wab extension to a .old extension.
Example: Rename jdoe.wab to jdoe.old.
To do this click on the file name and then on the top tool bar click on "File" and select "Rename". This will put the cursor in the file name and allow you to change it.
Once you change the name hit the "Enter" key on your keyboard.
Restart the computer.