1. Go to MENU
2. Go to SETTINGS
3. Go to APPS
4. Look for DOWNLOAD MANAGER under ALL
5. Disable it then enable it

Menu-> Settings-> Apps-> All-> Download Manager (Disable then enable)

If for some reason that doesnt work, try clearing your app cache, or deleting some recently downloaded apps.

1. Go to MENU
2. Go to SETTINGS
3. Go to APPS
4.Go to All Apps
5. Click the Bottom Left Touch Button ->And Select Reset Apps ->(this will not erase the apps) This Will Only Restore the Apps into its Fixed State.

After follow these steps your problem will solved as soon as possible. 

so here is all about Android Play Store Not Working Or Opening you can easily fix this problem.