|how are you connecting to the internet? |
Check your connect. make sure everything is in properly and if you have a strong connection if using wireless.
If using router: go into your router settings by typing its ip address in the address bar (it could be 192.168.1.1 you will have to check the default ip). Check the settings for reconnecting to internet after disconnect. There will be an option like "retry after ...1min, 2min etc". Try that.