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If you noticed an Internet speed drop after upgrading to the latest version of Windows 10, the following troubleshooting guide may help resolve it. It may be particularly useful if the Internet speed was fine on previous versions of Windows, and is no longer after the upgrade to Windows 10 Anniversary Update edition. Microsoft introduced a feature called Window Auto-Tuning back in Windows Vista, and has made it part of any newer version of Windows as well.

Set to on by default, it is designed to improve performance for programs that receive TCP data over a network. While data transfers should be more efficient as a general rule, users may experience slower than usual data transfer speeds under certain conditions or even connectivity issues. The first thing you may want to do is check the status of Window Auto-Tuning. If it is turned off for instance, it is likely that it is not the case for the slow downs, but if it is set, it may very well be the culprit.

Note : you don’t need administrative privileges for running the command above, but you will need them for modifying the Window Auto-Tuning parameter. If it is not set to disabled, it is being used by Windows to optimize TCP connections.

You may want to disable the feature to run connection tests and see if it is the cause for the limited Internet speed that you are getting out of the connection. You get ok as verification that the value was set correctly. You may verify this by running netsh interface tcp show global again. Once disabled, start downloads just like before and monitor the speeds that you get. Ok should be returned again to indicate that the new value was set correctly. It is recommended to check the global values again to make sure that is indeed the case.

If you want to know more about Window Auto-Tuning, check out the excellent analysis of the feature here. The article also refers to Restricted level only and not the default Normal. It should also note that the article is 2 years old. Common processors are more powerful than they were 2 years ago. I would turn off auto tuning to verify if it is the cause for the issue. However, if you notice other issues when disabling auto-tuning, then you may want to experiment with other options such as turning off heuristics, especially if it shows as restricted.

No please. It is ok to off heuristics. Its not really the incoming speed I have a problem with. Its the outgoing content that bothers me. Its encrypted, and I am not offered a key. So they are likely no better. Maybe Whonix this time. Its supposed to be ultra-secure. I regulary use NetSpeedMonitor that has the only problem of phoning home to the developper using Windows Explorer. But I guess he is alright! You are right, but there are situations where the local setup may play a role.

If you upgraded to Windows 10, had great speed before and afterwards not so much, then it seems likely that the upgrade may have something to do with it. Without RSS all of the processing is performed by a single processor, resulting in inefficient system cache utilization. Yes but here in Brazil the main problem is always poor connection speeds and lousy DNS servers. I did notice some odd behavior in Windows 10 but got solved by itself. The latest upgrade corrupted Edge browser in my profile so I had to create a new one.

Its a new notebook so there was not much loss. These days I use more the cellphone as Android 6 is great…. Pls confirm. CHEF ……. Same here, after anniversary update my downloads are capped. Tried to apply fix here no reboot yet no effect Damn MS, this is quite unbelievable. On my Mac its all good!!! But this little tool fixed it. Disabling this feature will definitely limit your Internet speeds.

Auto-tuning is consistent throughout all variants of TCP and present in all modern operating systems. This worked for me. Extremely low. This article proved to be a timely find. Made this change; system now stable touch wood! And the internet speed, which before had seemed quite noticeably sluggish compared to my other devices, is as good as the rest.

Setting this to disabled caused a massive drop in speed for me. Setting back to normal return normal speed. When connected to the hotspot, I received very slow internet speeds when using Firefox v53 or Chrome v58 but other internet applications, including IE and Edge worked fine.

Note that connecting through this hotspot used to work just fine, so I am unsure if it this was due to an upgrade in WIndows 10, or the recent upgrade to IOS, or possibly something in the Vodafone network. A dramatic improvement. I am just glad I found this article and solved a long running mystery. Thank you so much for this, for about a week i was wondering why my speed was so slow, my other devices had fast speed. For some reason i have to keep doing this occasionally.

Does anyone know why it is not permanent for me? It is happening almost once a day. My windows 10 computer is set up to dual boot with Linux. Still only get Disabling autotuning also killed my download speed. As soon as I turned it back on normal I was reaching download speeds of mbps. On one of my machines it was set to disabled and it capped TCP transfer speeds on all network adapters of that machine to Mbps even for LAN internal file copy operations.

This fixed my packet loss issue in online gaming. Thank you so much! Thank you, I found this setting disabled after just getting mbit fibre installed. Windows was limiting me to around mbit. I tested my networked cables with iperf and they are good for mbit.

Still running linux I am able to achieve mbit, so looks like windows is the bad guy here for me. Thankyou again though this has made things much better. Thank you very much, it solved my connection being stuck at mbps when it is supposed to be 1Gbps. Save my name, email, and website in this browser for the next time I comment. Please click on the following link to open the newsletter signup page: Ghacks Newsletter Sign up. Ghacks is a technology news blog that was founded in by Martin Brinkmann.

It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers. Search for:. Martin Brinkmann. Windows , Windows Find out if Windows 10 is limiting your Internet speed. Find out how to fix Internet connection speed issues on Windows machines after upgrading to the Windows 10 Anniversary Update.

File Explorer Tabs in Windows 11 version 22H2. Microsoft is experimenting with a search widget on Windows 11’s taskbar. How to change the Windows screen size in VirtualBox? Windows Microsoft improves File Explorer sidebar significantly. Comments normal said on August 5, at pm. I think normal user should not have bothered with this, I always get max speed. Decent60 said on August 5, at pm.

LogicDaemon said on August 5, at pm. Martin Brinkmann said on August 5, at pm. Anonymous said on August 11, at pm. Yes, gullible customers, let microsoft handle your connection speed. Martin, update slowed down my internet connection. Tried the above mentioned changes, it did not make any difference. Tom said on August 6, at am. Martin Brinkmann said on August 6, at am.