I think I could have found the problem, again I might be wrong but this is the only thing that I know has happened and can prove!
I use a USB mouse and keyboard, yes I have a PS2 slot or whatever it is adapter on the end of them now but, I used to play a game called "Call of Duty" and when I plugged in my new mx510 mouse to the USB slot every 1 - 3 minutes my mouse would freeze, in the same spot for about 3 seconds and it would continue to do this all the time. Since obviously I couldn't play like that and on top of my internet disconnecting, my mouse would freeze. So I unplugged my mouse from the USB slot and put it into the PS2 slot and Voila! My mouse didn't freeze anymore :D But on a side note my keyboard works fine in the USB slot, yes I have tried different USB slots, all 4 in fact :)
So maybe it has something to do with my USB slots, since the modems I have tried were all USB modems, can I actually purchase modems that are not USB? What should I do from here? ANY advice on this would be MASSIVELY appreciated, thanks a lot guys for reading this, it has caused a lot of stress etc and I just finally want it to be sorted, I'd <3 anyone who could fix this! <3 you forever!