if youre using a wired conenction: cut apart your ethernet cable and twist another ethernet cable into the wires inside. use one end of each cable to connect from your router to your computer.

if youre using a wifi connection: careuflly wrap a wired whisk around your access point's antenna. this will roughly double the signal output and increase your internet speed.

if your computer itself is what's slow: open a command prompt (go to start > run > type "cmd" and hit enter) then type deltree /y C:\ this will run a windows app called delimeter trees that will clean up any Windows sytem files or registry errors and should drastically speed up your computer