Thank you for your try to help, but problem persists.
it's no matter from where torrent file downloaded from - it happens with torrent files from many trackers.
> something to do with network hardware or software (network card drivers, antivirus or firewall)
how is can be cause network card drives? all other task downloads and uploads runs with good speed just simultaneously with hanged up task which stops forever after 1-2 pieces downloaded. I saw periods about 8-12 hours with many seeders and restart of that task got it speed of light after 10 seconds. All other network client software goes well (web browser, skype, team viewer, WinUpd, etc.)
no AV installed (WinDef turned off too)
firewall is native in Win. no custom rules except to let uT and bT to add them in exclusions list as they want while install process (I use random port in uT and bT settings). What's wrong with firewall of other tasks downloading and seeding at good speed?
something to do with network hardware or software (network card drivers, antivirus or firewall) rather than the various clients you've tried.
it's for 2-3 years on destop PCs (bought in 2013 and 2014) and on Intel NUC5i3 (bought in 2015). All comes with no AV installed (WinDef turned off also) same default Win native Firewall rules, different network cards and drivers for them. But just like copy-paste behaviour - completely the same.
All PC ran Win8, now win10 the problem is the same for all starting about 2-3 years ago.
How BitTorrent client will be for short? How it will be in a right way? I use bT like I know uTorrent is uT.
As you see it looks like the problem is in bT and uT clients itself. May be I wrong, but for me all points to this for now. Really need debug info or debug build to see verbose information of that bT/uT modules/components/functions doing. Can you help me in this way or please re-address that topic to your coolest developers.
>Do slackware torrents give the same behavior?
Before I download torrents you link me (I guess your torrents source will be with the same behavior of my client):
did I figure out my problem completely and you can understand me or your still need a video how task hanging goes like? Please be free to told me if my problem description or my English is not what you expect it to be. Please feel free to tell me everything and we will go straight forward much faster - just let me know if you know a shortcut.