Slow internet speeds after installing Hamachi

This worked perfectly.

Thank you so much!

Hello, if you don't know how to do it i made a simple program for it here :

(LMI moderator removed the link to the file as it was flagged by our security team. Please use a service like https://pastebin.com/ to post your code and share it for transparency). 

Oh and, this program is 100% safe if you want to see the code ill send it as well just ask for it, it's just simple batch.

Hope this works for you, best regards

-Bosky

This solution works for me,

Before found this one, i formatted the pc several times to try to found which program is the trouble, now its solved.

Thank you so much.

How do I verify the changes

This really is the fix. Love you man!

I cannot believe that something malicious is still available to download. Logmein took hamachi and turned it into a strange looking virus and does not provide any support. I was that close to reinstall windows just because of that *** tool.

Just create a VPN with you routers guys. Never install this.

Just wanted to say thanks, this actually worked. I've had this issue before and reinstalling windows was the only thing that fixed it, but this seems to have solved it for me.

HOLY CRAP!,  This actually solved my internet problems! I've been dealing with internet issues for months now. I would get speeds anywhare from 30 mbps to 200, while my acctual internet speed it about 500 mbps. I now get a solid 500 mbps.

Thank you so much, best regards

-Bosky

That did it. That fixed my VM that I am running it on. I am now getting the speeds I saw before installing Hamachi. Thank you for the help!!!

My cousing had been troubleshooting this for a few days and after starting to get involved in the troubleshooting the same problem occured on my main computer as well. There was no chance to increase the download above 1.3MBs (got 200/200 connection), unless downloading from a service that uses swarm tech (i.e Steam, Origin etc).

After backtracking we came back to Hamachi and this thread. We finally found the solution that worked for us. It seems installing Hamachin changes the TCP Global Parameters. To check/fix this, do the following:

SOLUTION:

Start -> Run -> CMD (as administrator to buypass the UAC)

then type the following command to show what parameters your current TCP has:

netsh interface tcp show global

This should give you a list over the TCP parameters, the ones Hamachi seems to change are these two:

Receive-Side Scaling State & Receive Window Auto-Tuning Level. Recieve-Side Scaling State was set to 'disabled' and Recieve Window Auto-Tuning Level was set to 'disabled'

Type the following commands in the CMD to change this:

netsh int tcp set global autotuninglevel=normal (Response should be OK.)

netsh int tcp set global rss=enabled (Response should be OK.)

Reboot shouldn't be needed after, but if you encounter problems do it. We didn't test Hamachi after this because we uninstalled it so I don't know how it works after this change.

I have no idea why Hamachi changes these parameters on some/all computers? When we checked other hosts in our network running the same OS without hamachi these parameters where unchanged and download speed OK.