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.
you don't really need driver's to transfer file, pic, doc, movies,etc...
just connect the Mini USB cord and on your tablet's notification area make sure you select USB connected.> select USB connect and the android will turn Orange.
You will see Drive E :(that will be the Tablet's Hard Drive Storage)
and F: (F) drive will be your external SD-card storage.