Cannot download apps

Hi until you're WiFi problem is solved u can't access Google play ...try another WiFi to check if it's the tablet at fault or WiFi....cheers

Try update your google services go to settings then apps go to google services and try and update it if there's software update available

is there an error message? make sure you are connected to WiFi then try to update the google services mannually.
Go to Settings > Security > unknown sources enabled it. This just allows you to install apps from outside Google Play. Google Play services 11 9 51 APK Download by Google LLC APKMirror
Make sure you download the Google Play Services APK from link, then install it. Your tablet must be Android 4.0 and above. how this helps. please reply.

not sure if this link will help you out.
https://www.google.co.uk/webhp?sourceid=chrome-instant&rlz=1C1CHBD_en-GBGB719GB719&ion=1&espv=2&ie=UTF-8#q=Why+is+my+emerson+tablet+not+letting+me+log+into+my+google+play+to+download+apps

What are you using Wi-Fi for? You may have Wi-Fi but your Wi-Fi it may not be hooked up to the Internet. Try restarting your Wi-Fi / router.

Tablet Reset

download games

You need to search for a guide to install manually the GAPPS (google apps & services) on your tablet. Many low cost tablet are provided with no play store and other services. But it's not difficult!

Fixing RPC:S-5:AEC-0 Google Play Store Error

The Google Play / Android Market error retrieving information from server RPC:S-5:AEC-0 error message can be a bit of a pain, the RPC:S-5:AEC-0 error just randomly appeared on my tablet after it upgraded to a newer version of Android. However this is how i managed to fix the RPC:S-5:AEC-0 error with ease.

1. Load the Settings app, click apps, then select "All"
2. Next in the all apps view find the "Google Play Store" and click on it
3. Now click "Clear Cache" (Not Data), then Force Stop.
4. Next in the same app list find "Google Service Framework"
5. Click clear data (Not Cache), then Force Stop
6. Switch off the phone or tablet and turn it back on
7. You should be able to download and update apps from the Google Play store once more.

Enjoy no more RPC:S-5:AEC-0 errors when downloading or updating apps.
Or Simply Go to settings/app.manager/all
Delete data + cache :
Google Play Store
Google Play-services
Google Services Framework
Hangouts
Market-feedback agent (important)
Then delete google-account(data/system/user/0/ fine the accounts.db file and cut and paste it somewhere else)
Restart the phone and then re-add google-account( paste your accounts.db file earlier to it's original location).
p/s~Your device need to be rooted to remove/delete google account without a factory reset.

enjoy and have a good day :)