Some time ago I bought a tablet Vandroid T2i, a few days after using it. Application is safe, but on the 5th day I use there appears a message "Unfortunately, google play store has stopped", after I try to reset it again, but the same thing happen again. But, I get the solution and following the steps:
Create a new gmail account to log into google play.
Open T2i your tablet, go to Settings -> Applications -> Manage Applications
Then, look for Google Apps play store, and then click the application. Then came the settings and delete its history by clicking the "Clear Data" and "Clear Cache".
Once done, go back and Google play store, you log in using your new gmail account and you can download the applications market is there.
If the above step does not work, the solution you need resetting your Tab. (Note: If you reset the reset, all the applications installed on the tab can be lost, but can be downloaded again anyway). Then, you download the file (. Apk) google play on a PC or directly from the tab and you re-install the google play store.
After that you login using gmail account you just created it.
I've tried out the thing, the results google play store I was going well until now.
Note: Never open / login play store using the account / new email on the PC, because it will make the application google play store displays the message "unfortunately, google play store has stopped".