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?
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.
