I recently had a very frustrating issue where my laptop was struggling to upload anything to anywhere (OneDrive, photo uploads, etc.) were appalling but other than that, everything was running fine.
First things first, I performed a speed test on my device (one via Google, one via Ookla):
Both tools showed a consistent fast download speed but upstream/upload speeds were terriblly slow (around 0.25Mbps), I began the usual diagnosis of my network, restarting the router, etc. and then on whim – grabbed my tablet and did a speed test on that – lo and behold, no problems!
Having isolated the issue down to just my laptop, I started looking diagnosing the network connections. One of the changes recently introduced was my configuring Hyper-V and virtual switches on my laptop – sure enough, this had setup Bridging on my network adapter (Network interface card – NIC) and disabling this immediately solved the problem!!
- Go to Start
- Control Panel
- Network and Internet
- Network and Sharing Center
- Change adapter settings
- Right click on the problematic connection
- Select Remove from Bridge
IMPORTANT: Remember if you have a network bridge, it was likely created for a reason (such as providing connectivity to Hyper-V virtual machines).
Some terms to help other find this are Slow speeds on one device online and Windows 10 slow upload speed only.