We had the same problem with this exact tablet: fortunately, I found a video that showed how to correct this error - - 
http://www.youtube.com/watch?v=uv8d-nl04qI
Basically, you enter Settings;
Delete your Google account information;
Enter Apps, go to All Apps, and delete data in the following THREE places:
Download Manager
Google Play Store
Google System Services
Then, you re-enter your Google account information.
It worked for us, I hope it works for you, too.
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