I've tried in many browsers, but I don't get what happens. Every browser my download is slow. However, on Steam, my download is 100% normal. I've used fast.com (powered by NETFLIX) to test my speed and it's still high.
@leocg My VPN is off and antivirus on. However, on Google Chrome it wasn't always that I had this issue, sometimes it downloaded normally. Here on Opera is always slow. But I'll try going to a Windows forum, then. Thanks for the help