I see two possibilities here. One is that you have a 64bit Windows 8, and 32bit BitTorrent; and the Task Manager has problems in identifying traffic from within the 32-bit VDM. If you have a 64bit Windows 8, you can test this hypothesis by installing 64bit bitTorrent.
The other possibility is that bitTorrent is playing tricks with WFP, the Windows Filtering Platform (ex LSP, Layered Service Provider) in order to make good its claim to "optimize bandwidth usage":
BitTorrent auto-adjusts bandwidth usage, based on your network and
Internet connection, to ensure fast file delivery. Your downloads run
in the background. Which means they’ll never slow down video chats or
game play.
In that case, you could try fiddling with bitTorrent's bandwidth usage options to see whether one of those is responsible.
The fact that user Hardy's installation appears to be working proves that there are no inherent problems in either Windows 8 or bitTorrent; this must be a configuration problem (or maybe a conflict with some other installed software. In that case, maybe unistalling bitTorrent and re-installing it, therefore "on top" of whatever network driver and service chain you have, might fix the matter).
Is that Task Manager showing processes from all users? – week – 2013-08-26T13:33:43.287
Yes. But how this can matter? Torrent downloads hard while task manager shows zero for it. – Dims – 2013-08-26T13:49:06.550
I remember that the Process Explorer from Sysinternals has the same problem. Since the company is now a part of Microsoft maybe the bug is related. – Doktoro Reichard – 2013-08-28T14:23:11.400
Does the bandwidth usage show up under "System" in the task manager? – Darth Android – 2013-08-30T18:40:50.310
Try this with another torrent client such as Vuze (vuze.com). It may be your torrent client. – Jon – 2013-08-31T00:01:05.833
3
I had this issue, found out that Connectify had installed drivers that conflicted with a hidden Windows 8 driver that detects network usage.
– Mark Lopez – 2013-08-31T20:19:43.487@MarkLopez so this is probably similar case. So, I want to find this malware and kill it. – Dims – 2013-08-31T20:22:28.423
Connectify is not malware. – harrymc – 2013-09-01T12:46:04.897
@harrymc, I know, this was just sarcasm – Dims – 2013-09-01T18:01:30.720
1I have the same problem, I think it's related with VirtualBox virtual network drivers, do you have VBox installed, or maybe VMWare? Another possibility is about Hyper-V virtual network adapters. – None – 2013-12-26T13:23:16.993
Disabling the "Virtualbox Bridged Network Driver" fixed the windows task manager mbps display (for me) – thijs – 2014-01-28T15:38:39.077