Question

android unfortunately dmclient has stopped

Answer 1

• First, you have to go to the Settings menu on your smartphone.
• Access the Application Management section, and scroll right to All.
• Search the dmclient  has stopped.
• Access to dmclient  and tap Clear data and Clear cache.
• reboot your smart phone

Answer 2

Me too happened to me, what I did was go to
Settings / applications / manage applications / all / and looking for the DM Client application that occupies about 40 KB, you click on it and hit 'Force Stop "(no matter what I tell you later) and delete data.
Reboot the tablet