Cant download or stream

First out. Sorry for my lack of English. It's not my premier language. So be patience with me.

Recently i bought a new computer with Win7 Pro. Well the computer works just fine and i really love Win7 except one huge problem. Sometimes all my web browser stops downloading and i cant do anything until i restart the browser. Let me explain.

I use my default web browser (Firefox) and surf the web. Everything works fine until i download a file or look at youtube. Suddenly the movie/file just stops loading and stays there until i stop it, restart the browser and try again. Maybe, and just maybe it will go to 100% this time. Same problem occur with IE.

I figure out that it's maybe my copy of Win7 thats wrong. So i did a complete clean installation with all the necessary drivers. Guess what, same problem as before

How i know it's Win7 fault? Well i have 4 other computers at my network (Router) And none of them has the same symptom. Windows firewall is off and Win defender shut down. What more can i try?

Try a malware scan
Malwarebytes

Injen said:

I figure out that it's maybe my copy of Win7 thats wrong. So i did a complete clean installation with all the necessary drivers. Guess what, same problem as before

Again :)