Slow internet speed on windows 10 but windows sandbox and other virutal machines are just fine.

Question

I was downloading a file from Github and the download speed was ~3MB/s (megabytes). When I downloaded the exact same file (on the same pc) using windows sandbox (basically a vm) the download speed was ~74MB/s. What could be the reason for this?

I also did a speed test. On my host os the speed was 40mbps and on the sandbox it was 700mbps. Its the same pc so shouldn't there be no difference in the speed tests? Also would I have to clean install windows?

Answer 1

Hello,



Please run Network Adapter troubleshooter from Settings app > Update & security > Troubleshoot > Additional troubleshooters on host OS. See if it helps you. 



Hope this helps!

Answer 2

Hi,

Thanks for posting in Q&A platform.

For network speed slow performance issue, it's necessary to analyze performance log and network traffic to find the cause. However, analysis of log is beyond our forum support level and due to forum security policy, we have no such channel to collect user log information. So, we recommend you open a case with MS Professional tech support service, they will help you open a phone or email case to Microsoft, so that you would get a technical support on a one-to-one basis while ensuring private information.

Here is the link, you could find phone number of your region accordingly from the link below::

https://support.microsoft.com/en-us/gp/customer-service-phone-numbers

Best Regards,
Sunny

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Answer 3

Hi!

I found the solution on reddit and with the same text, I'm bringing the solution here to serve more people with the same problem.

In an elevated command prompt type:

netsh int tcp set global autotuninglevel=disabled

Then type:

netsh int tcp set global autotuninglevel=normal

This should disable and re-enable the network tuning and should fix the slowdowns.

Source: Reddit /r/windows, by user @TVOGamingYT