January 12th, 2013, 5:27 pm
I suggest checking what services you have open, some programs may use internet wich can cause trouble, you can check this the easiest way to look at the right-down-corner from your desktop try to close as many programs possible to regain as much internet capacity.
Another reason could be that other people on your network are using alot of internet capacity, for example your brother is watching alot youtube video's or your father is downloading a movie. If you have WIFI on your router and it's not protected it could be that your neighbors are using your wifi wich can cause lag too.
Another reason that it could be, i doubt it, but it could be that someone is DoS'ing your router, but i don't think that this is the problem. You might call your ISP and ask if they've noticed alot of packages going to your IP.
I hope it helped you.