I've been having this issue for so long now! For some reason, my internet is blazing fast until I install Hamachi. Certain website downloads are affected but others aren't. for instance, downloading a zip file from "downloads.oneplus.com" WITHOUT Hamachi shows 3 minutes left. AFTER installing Hamachi, that same file now says 20 Minutes.... Same issue happens with Microsoft's download servers, when trying to download the Windows 10 iso, Hamachi just DESTROYS the download speed when my internet is more than capable of downloading large files quickly! Even uninstalling Hamachi leaves the same affect, almost like there's something left in the system that causes this, registry data maybe? Any pointers?

Try this to check the status of Receive Window Auto-Tuning Levelnetsh interface tcp show globaland if it is disabled, turn it on withnetsh interface tcp set global autotuninglevel=normalThis helped me and two mates. The settings need to be run with admin rights cmd (and shift+ctrl when you run it).As far as we understand it you would most likely want Receive-Side Scaling State enabled as well.netsh interface tcp set global rss=enabledWe have not tested Hamachi after changing these settings. Nevertheless, just wanted to share because this problem was making us crazy.

Slow internet speeds after installing Hamachi

Amb1gamer
New Member
9 years ago
:smileysad:So am 64 bit tried to change the metric to 9000 didn't work tried reinstalling didn't work tried disabling hamachi adapter didn't work WHAT DO I DO :(
- Soporte_Pixvs
  Active Contributor
  9 years ago
  Hello.
  
  You have to download an older installer and re-install the hamachi for works again.
Elinor_Dashwood
Active Contributor
6 years ago
DainisLV Kotala It's not ideal - but I mutually block all traffic between peers that I know are on the same LAN. This forces the traffic to use the physical LAN connection instead of the Hamachi VPN connection. It means the peers on the same LAN always appear as "red" to each other, but it gets around the slow traffic between machines.
- kcallaway
  Visitor
  4 years ago
  I would love to know how to do what Elinor has described if anyone could point me in the right direction?
Sjaco
New Contributor
6 years ago
Before installing Hamachi my internet speeds are showing 200Mb/s. After installing it I constantly get 60Mb/s. I have uninstalled Hamachi but nothing changes, is there a setting somewhere that can resolve this?
- Sjaco
  New Contributor
  6 years ago
  My system specs, I meant to put this in the original post.
  
  Windows 10 latest patches
  i7 4790k @ stock
  16GB DDR3
  1TB NVMe drive
  
  My internet is 200Mb/s but after installing Hamachi it falls to 60Mb/s
  - Sjaco
    New Contributor
    6 years ago
    I just did a test on a Windows 10 VM and when I installed Hamachi the VM went from 200Mb/s to 60Mb/s could this be a setting somewhere or a bug?
- ryoma
  New Contributor
  5 years ago
  If you want to save some files You can only use Windows OS to initialize it. Keep the file but delete only the settings and os app. https://ckghwn.tistory.com/629 It's difficult because it's in Korean You can tell it roughly by explaining it with an image. I initialized os and saved the file through this method
  Kindly, you will have an html called Removed App on your desktop. It's easy to reinstall while looking at it
  If you have a graphics card driver, use a DDU It is recommended to remove and reinstall
  See the link https://community.logmein.com/t5/LogMeIn-Hamachi-Discussions/Slow-downloads-after-installing-Hamachi/m-p/213095#M18101 for another alternative.
- carlossgv
  New Contributor
  5 years ago
  I found a way to keep Hamachi and maintain your internet speed while you are not using it.
  
  Go to Services (Windows Search Bar: services.msc) and look up for LogMeIn Hamachi Tunneling Engine, disable it and restart the computer. It worked for me, if I need to use Hamachi again I'll enable it just for the time being. This way at least you won't have to format the OS.
  
  Hope it helps! Is not the ultimate solution but it works.
Cykr1L
Active Contributor
5 years ago
got the same problem here ... after installingy hamachi i`ve got slow downloads on HTTP and on steam, origin and so on ... uninstalling hamachi doesn`t fix it ... need some help

i`ve testet jdownloader and if i download something 10 files with 20 downloads chucks at the same time i got mei 1 gigabit speed ... but this is the only way
- H4X0R46
  New Contributor
  5 years ago
  So I'm not the only one! Yeah I tried EVERYTHING to get my speeds back, I finally got frustrated and reinstalled Windows on my PC, and found an alternative for Hamachi. I will never use Hamachi again because of this issue that was only fixed by a clean OS install. Not sure if I'm allowed to mention what I use now, so message me if you're curious :)
  - Cykr1L
    Active Contributor
    5 years ago
    What alternative did you take?
    So... I guess I have to kill my system too 😑
ryoma
New Contributor
5 years ago
omg
It's exactly the same problem as me
I've been struggling for months now and I'm sad that there's still no solution.
As you said, only OS reinstall is the solution :(
- H4X0R46
  New Contributor
  5 years ago
  Oh yeah it's a REAL BUMMER having to reinstall your entire OS over a single app, but it was the only thing that worked for me. I have no clue why Hamachi slows your speeds like it does, but it somehow needs a clean install of the OS to reverse? Bummer for sure.
  - ryoma
    New Contributor
    5 years ago
    Yeah Unfortunately, the only way to do this was to reinstall the OS. I'm very tired of this
    I tried everything I know It all failed
    I'm tired of fighting this problem anymore.
    The mega support team Say:We do not know how Hamachi works, so we cannot advise you, so could not help.
    The only solution to this problem seems to be the Hamachi Support Team. It looks difficult too
    I've been struggling with this for months. I have already written about this, but there is no answer
    Then I saw your writing I feel as you say This problem won't be solved right away.
    The RADMIN VPN you recommended works well without any problems Thanks for the recommendation
    I feel like there's a registry involved... but I'm tired of trying it out :smileysad:
    What's the matter now? I'm not going to use it. Thank you for your reply and have a nice day
Hiddenbonus
New Member
5 years ago
After installing hamachi my internet speed has become much slower. My speeds used to be 200Mbps on download and 20Mbps on upload and now they are 20Mbps download and 8Mbps upload even after uninstalling hamachi the same problem persists. This problem has been ongoing ever since I downloaded hamachi. Help is greatly appreciated :smileysad:
- Former Member
  5 years ago
  Hello Hiddenbonus,
  
  I was expirencing the same problem as you, but i have the solution for you. I wrote a program to fix it. I wrote this progtam and it is 100% safe, if you have any questions please ask them. Here you go! :
  https://drive.google.com/file/d/12FUWdJYjSMd0Qdo5hnsNSm5hr2BEA_-u/view?usp=sharing
  If you still have doubts you can contact me on Discord at : Bosky ^^#3172
  
  Hope this works for you, Best regards
  
  -Bosky
  - Thugnificent
    New Member
    4 years ago
    This worked perfectly 😃
hanamura
New Member
5 years ago
I setup hamachi as discussed here . The objective was to router all traffic from computer B through computer A.

This works, but the internet is very slow and I mean dialup slow. I get 'waiting for tunnel' for at-least 10 seconds after which website loads slowly.

I have 100mbps connection, so its not my connection speed.
- AshC
  Retired GoTo Contributor
  5 years ago
  Hi hanamura
  
  If you have a paid Hamachi subscription there should be no connection delays. This is only a restriction of the Free version.
GazCBG
New Member
4 years ago
Hi,

I tried out Hamachi and noticed it slows down my internet, even when not connected.
I found the fix, for this which sorted out my download speeds, but would like to know:

Is it a 1 time fix or do I need to keep doing it?

Thanks
Keano16
New Member
4 years ago
Hello,

I have two offices at different locations and I use Hamachi to share network between them. Both of this offices have pretty good internet connection 100/100 FTTH. Unfortunately transfer speeds using Windows explorer are not more than 900 Kb/s. Connection is green - "direct tunnel".

What could we do about that?

Thank you!
peatprey
Visitor
4 years ago
Removing the program and restarting does not help. But when I wrote thats in the command line, this all became normal. The speed is returned to the original 9-10 MB.

netsh int tcp set global autotuninglevel = normal
netsh int tcp set global rss = enabled

I didn't notice this before. Please fix