Windows 10 Throttle uploading speed for streaming HELP!

[sodade21]

So My problem is this..
I have 2 PC with Windows 10 that on all speed tests got 30-40 uploading speed.
at twitch (and others) speed tests Im getting an average of 4-5 upload.
I tested the TCPOptimizer at windows default,optimize options,custom with some tests.no much of luck.
when I was trying to mess a bit with congestion provider to none when i restarted my streaming test was up to 20-30 which is normal for the servers i was testing it.
all worked well till i restarted the pc... I was checking the TPC optimizer and the congestion provider was reverted back to CUBIC ( I guess that is the default now,but also the none..?)... i tried to changed it again to none and after restart
it worked again and i was able to test the uploading to 20-30 and stream without issues at my desired upload speed that is 6-10.
Yesterday windows had an update and now anything im doing doesnt make my upload good for streaming... like i have a limiter inside windows tha limit my upload for streaming to 4-5.
with the same router i connected to my pc via wifi same issue...I was trying to fear that my ISP maybe had something to do with it then i tried to connect with the same router and wifi connection (same ISP)
with my mobile phone and at the same tests i got constant 30+ uploading speeds...
that lead me to believe that is something wrong with windows 10.... tried also to flsuh dns and a bunch of other similar things with command promt nothing seemed to work.... any suggestions? Im at a wall at the moment cant figure this out... please help.
also tried same net test with a vanilla new windows 10 pc out of the box and has the same issue.. that leads me more towards windows 10 issue...some hidden limiter/throttler than anything else.

[Philip]

Later builds of Windows 10 have improved on the TCP implementation in general, adding the CUBIC congestion control algorithm, etc.
You may want to try changing it back to CTCP, with or without ECN to see if it makes a difference.

Does the upload speed vary throughout the day, or is it always throttled to about the same?

Make sure there is no third-party anti-virus/anti-malware/security software installed and running in the background, as many tend to try and inspect every packet, effectively throttling the connection.

You can also try resetting TCP/IP and Windsock, there is an option in the "File" menu of the TCP Optimizer.

[sodade21]

Thanks for the Reply!
I have tried to change to CTCP with and without ECN did not make much of a difference... my connection is more or less stable all day and night..just only the throttle at streaming sites.
netsh int ip reset
netsh winsock reset
netsh winsock reset catalog
netsh int ipv4 reset reset.log
netsh int tcp set heuristics disabled
netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global rss=enabled
netsh int tcp set supplemental custom congestionprovider=none
ipconfig /release
ipconfig /renew
ipconfig /flushdns

[sodade21]

Have you tried to Disable the Flow control on the Gigabite network connection? It should in the path of the [network adapter after the device manager

I did Tried this once... same results on twitch and youtube stream upload. i tried it again. same......... any other suggestions please?

[sodade21]

I still haven't Figured out the problem,but it seems that my upload is fine at most of the tests and the problems seems to be focused at RTMP that twitch, youtube and other streaming services/tests uses... is there any setting/registry change or something i can try to make those to not be throttled by windows 10?

[Philip]

Could it be that your PC is being overloaded with video processing and/or other apps/games causing the slower upstream speed?

[sodade21]

sadly my pc is clean of other bandwith/loading and games when im testing. free of viruses and malwares. also same issue is with all of my other windows 10 pc's and laptops.