AHA!!! SOUNDS LIKE YOU HAVE A POR..... OH WAIT NVM,
#1 - Factory reset your shitty modem
#2 - Change the cables from modem to puter, if youre using wifi then stick the antenna up your arse for extra lube/signal strength
#3 - Try a different modem.
#4 - Request a new IP address just for lulz
#5...