if u have a laggy computer id advise this that you set your computer back to factory setting (Like when you just bought it) and re-download what u need.If its a work computer or it has valuable information save it on a usb flash drive.If its just all gaming re-download the stuff u need . it increases 2x your normal OR 3x if u want best fps don"t download too much just the basics u need . thank me
if you are running wireless and are using some sort of net-gear make sure u have the CD they gave when you bought it or it will be a hassle to get internet