Jul 30 2021 10:06 AM - last edited on Sep 21 2021 09:19 AM by Trevor_Rusher
recently I updated my windows 10 to windows 11. after that my download speed is suddenly decreased my actual internet speed is 25mbps when I check on the speed test also its showing 25mbps but while downloading on chrome or on Microsoft edge it'll be decreased to around 200kbps and even youtube is also the same. I tried resetting the network adapter. please give me some solution.
Link speed (Receive/Transmit): 100/100 (Mbps)
Link-local IPv6 address: fe80::8de6:78e6:f807:ff5d%6
IPv4 address: 192.168.100.7
IPv4 DNS servers: 192.168.100.1 (Unencrypted)
Description: Realtek PCIe GbE Family Controller
Driver version: 10.26.328.2018
Physical address (MAC): **************
Oct 09 2021 04:10 PM
@anupbadri I upgraded today and have Gigabit fiber internet service and I am barely getting 50 down and 4 up on Wifi. I have no Killer services. So disappointed. I tried upgrading my drivers. I bought this laptop 3 weeks ago and it said it was able to be upgraded.
Oct 17 2021 01:19 PM
@anupbadri I used TCPoptimizer and set it to 100MBPS. Run it as administrator. Boom, speeds back to normal. Great little tool, changes all the settings for you. I didn't have any of the KIller stuff in Settings, so this worked for me. Just Google the program, free.
Oct 19 2021 06:57 PM
Oct 27 2021 04:22 PM
The Reason for the Speed Problem is very Easy. On the Device Manager, select the Network Interface, right click and then on preferences. Click on Extended. Seach for Speed & Dublex. On my device the 2,5Gbs entry was selected. Go to 1.0 GBS FullDublex and the Problem is solved!!!
Oct 27 2021 06:28 PM
@WenchxHunter No clue. The upgrade must use generic Registry values that don't work for all. But this little tool has always fixed my problem. It simply tweaks the registry values for better throughput. Wish I had a better reason as I'm just guessing. But this always seems to happen with upgrades and some updates. Glad the fix worked for you.
Oct 30 2021 02:49 PM
In my case, I simply disabled Citrix Virtual Adapter. It seems this virtual device did not like the upgrade from Windows 10.
Nov 05 2021 05:27 PM
Nov 12 2021 02:49 AM
Nov 18 2021 08:54 AM
Disabling the IPv6 did the trick for me!
How I did it:
Massive changes here on both, wifi and cable.
Hope this helps! :)
Nov 19 2021 04:12 AM
I did a few tests toggling IPv6 and it turns out that the wifi was just oscilating.
It seems that the problem here is related to my router.
My cellphone gets better speeds, so Windows 11 is probably causing some issues, nut it was not the IPv6.
Sorry for the false positive. :(