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New Contributor

Slow internet speeds after installing Hamachi

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?

1 ACCEPTED SOLUTION

Accepted Solutions
New Contributor

Re: Slow downloads after installing Hamachi

Try this to check the status of Receive Window Auto-Tuning Level

netsh interface tcp show global

and if it is disabled, turn it on with

netsh interface tcp set global autotuninglevel=normal

This 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=enabled

We have not tested Hamachi after changing these settings. Nevertheless, just wanted to share because this problem was making us crazy.

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50 REPLIES 50
New Contributor

Help hamachi made my internet connection so slow in my computer

Smiley SadSo 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 😞

Active Contributor

Re: Help hamachi made my internet connection so slow in my computer

Hello.

 

 You have to download an older installer and re-install the hamachi for works again.

 

 

New Contributor

Installing Hamachi slows my internet speed

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?

New Contributor

Re: Installing Hamachi slows my internet speed

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

New Contributor

Re: Installing Hamachi slows my internet speed

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?

Active Contributor

Re: Slow downloads after installing Hamachi

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

Active Contributor

Re: Installing Hamachi slows my internet speed

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

New Contributor

Re: Slow downloads after installing Hamachi

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 🙂
Active Contributor

Re: Slow downloads after installing Hamachi

What alternative did you take?
So... I guess I have to kill my system too 😑