The internet speed on one of my computers has slowed considerably while the other computers remain fine. I ran speed tests at speedtest.net, here the results:
Slow computer: Download speed - 11.1 Mbps Upload Speed - 16.44 Mbps
Fast computer: Download speed - 52.8 Mbps Upload Speed - 16.52 Mbps
Certain websites can't load properly, some downloaded files appear to be corrupted and I have trouble watching streaming video. I have done scans with Kaspersky Internet Security 2014, Malwarebytes, Spybot, Trend Micro and Ad-aware but no change. When I would try to update those programs, they couldn't do it. I manually updated them iand ran scans but the problem still persists. I have no P2P software running. I have the same problems in safe mode. I normally use the wifi but I tried switching to an ethernet cable, still no change. I am running Windows 8.1. Could you please help me resolve this problem?