As I told you before KezzerDrix, best option is to buy one of those routers/firewalls... you can go as cheap as 25 $CAD, and that's in my opinion still very affordable for students. SMC Barricade 7004VBR routers are very effective, price is more than great, and also you have 4 additional LAN ports (in case you wanna connect more than one computer in your house/apartment). Having at least one of those hardware firewalls, will give you much better protection even if it's combined with standard (read - not fancy) Windows firewall...
Cheers !