Hi just want to say that I got one of these faulty tablets with the same probs as everyone else.I trawled the net trying to find a solution I reinstaled the play store on more than one occasion and different versions too but no sucess.
DGM the answers that you've posted such as to check wifi etc are ridiculous its a definate fault with the firmware you've put onthese tablets
luckily though I've found a temp solution and that is to download an alternative market pm me for the link if you want it as it wont letme post it here
*It works fine and let's u install all the apps you want the first ones I did where firefox and adobe and now my tablets ok I hope that dgm will release a fix for this but I won't be holding my breath and I'm going to keep trying to fix it myself if I do I'll post a reply here I hope this helps