Tag Archives: Windows 10

Fix: for VERY slow WiFi in Windows 10

Article updated 6th Jan 2016 – please see addendum at the end

Some users of Windows 10 (any build number) have complained that their WiFi has been going slow –  VERY slow. Separately, some people, who haven’t noticed that they have a slow WiFi connection, have complained about other symptoms related to a slow network connection – like poor quality Skype, Lync and Skype for Business calls.

I have discovered that the problem is related to Bluetooth being turned on.

Here are my speeds from the Thinkbroadband  Speed Test (a far more accurate test than others out there) showing my speeds with Bluetooth turned off and then on:

BT screws wifi woodygems

To cut a very long story of testing with various WiFi and Bluetooth drivers and testing with PC’s with different WiFi and Bluetooth hardware, I have discovered what causes this problem (but I don’t know why – yet).

The fix, is simply to turn OFF location in Settings –> Privacy –> Location:

W10 location woodygems

Obviously, I would love to know if this fixes slow WiFi for you – so please leave a comment.

Addendum 6th Jan 2016

After further testing, I have discovered the problem/fix to be much more subtle and while still related to the Location state, it doesn’t actually matter what state it ends up in, as long as the state is toggled.

i.e. If your have WiFi AND Bluetooth ON AND your WiFi is running slow, simply try changing the Location state to the opposite of what it currently is and then change it back again.

For me, on a new install (any W10 build) or rebuild/update, if WiFi and BT is initially ON by default I have SLOW WiFi whatever the state of Location i.e. Location can be initially on or off, it doesn’t matter. What is important, and the fix for me, is that the state of Location just needs to be toggled in order for slow WiFi speed to recover.

© Woody – January  2016

[This article is original work – over which I own and retain copyright.

You are welcome to use and otherwise republish this article as you will – but I just request that you attribute me as the original author. Thanks.]


How to speed up Windows 10 (Technical Preview – Build 9926)

If you are a Windows 10 Technical Preview “pioneer”, you will already be loving the enhanced GUI, Cortana and the new Notification Center etc. HOWEVER you might find it goes a bit slow at times and, if you like to keep an eye on Task Manager, you’ll note that CPU utilisation can shoot up randomly – so here are two Woody Gems® for how to remediate that:

Warning: If you are currently running Windows 10 Technical Preview, then this article assumes that you know what you are doing. If you are unused to using regedit or of a slightly nervous disposition, then DON’T TOUCH THAT DIAL – here is a picture of some kittens instead.

1. If enabled, speed up Windows 10 by disabling Windows Installer logging

See: http://support.microsoft.com/kb/223300

Note: The “Fix it” won’t run on Windows 10 – so ensure that you delete (if it exists) this key:


2. STOP the Diagnostic Tracking service:

In Task Manager,  find and expand, the Service Host Local System with from 17 – 23 processes/services. Right-Click the Diagnostics Tracking Service and select “Stop”

Task Manager

[Yes, you could permanently disable this Service – but given that I am not entirely sure what it does – except for chewing CPU cycles – it might be safer to just stop it as needed]

That’s it – Windows 10 Technical Preview will go like the clappers now.