Dragon has suddenly started giving me an error message: ‘SendKeys Canceled’, how can I fix this?

Adobe Acrobat Reader X does not interact well with Dragon NaturallySpeaking v11 & Dragon Medical v10.1. If you have been receiving the “SendKeys Canceled” error message, it was most likely caused by Adobe. Basically, you have two options:
  1. Open Adobe Acrobat Reader X, go to the Help menu and select [Check for Updates]. Download the latest update patch for Adobe Acrobat Reader and install it. In some cases, this update seems to fix the problem. However, it only seems to fix the problem for Dragon NaturallySpeaking version 11. If this doesn’t correct the problem, try the fix below.
  2. Completely uninstall Adobe Acrobat Reader X. If you need a PDF reader, we recommend Nuance’s PDF Professional. Another good alternative is Nitro PDF Reader, which can be found online.