Windows 10 Download Speed is very slow

nedim34 I have the same problem as you have described. Slow download, normal upload, other devices on the same LAN are unaffected.

Here are my troubleshooting steps in full:

Windows 10 Home (64-bit)
Version 21H2 (OS Build 19044.1526)

Slow download speed in Windows 10
The issue: Download speed on my Windows 10 workstation is 5 Mbps, whereas Upload speed is 8 Mbps, as measured by speedtest.net and my ISP’s speed test page. Download speed is 25 Mbps when measured by a Samsung A20 mobile, under Ubuntu Linux on the same workstation, and on a Windows 10 laptop in the same room. So clearly there is something wrong with the Windows 10 installation on the workstation, and it’s not a hardware issue.

I have documented the articles and steps I took to try and remedy the situation. (so far with zero success)
https://www.alphr.com/slow-internet-windows-10/

- Disable Peer-to-Peer (P2P) Update Process

Settings > Update & Security > Advanced Options > Delivery Optimization : OFF

- Close Running Background Applications

WIN? + R > resmon > [Network] >

Examine which processes are transmitting the most bytes.
I shut down Dropbox, Steam, rsVPN (LAN for Sacred) and others,
get <10 kbps network activity, but download speed is still 5.86 Mbps, when it should be 25 Mbps.

- Stop background apps from running at Startup

Settings > Privacy > search for ‘Background Apps’ > Let apps run in background : OFF

- Use Google DNS

Right-click wifi logo next to clock > Open Network & Internet settings > Change adapter options > Right-click Wi-Fi > Properties > Internet Protocol Version 4 (TCP/IPv4) > Properties > Use the following DNS server addresses > Primary DNS : 8.8.8.8 ; Secondary DNS : 8.8.4.4

- Disable Windows Updates

? > Control Panel > search for ‘Administrative Tools’ > Services > Windows Update : Stop, Startup Type : Disabled

- Edit Group Policy Settings

This is only available in Windows 10 Pro. I have Windows 10 Home

- Install/Update Official Network Drivers

I uninstalled and deleted the drivers for the Wifi adapter and redownloaded and reinstalled them from the official site.

- CCleaner Free

Just ran the basic system drive cleaner and the Registry cleaner

- Glarysoft Utilities 5

Ran 1-Click Maintenance (no Disk Repair, no Tracks Eraser)
This program has a lot of functions, I did not investigate them yet.

- Disable firewall

Control Panel\System and Security\Windows Defender Firewall

Disable Windows Auto-Tuning

WIN > cmd > Run as administrator

netsh int tcp set global autotuninglevel=disabled

To check the changes:

netsh interface tcp show global

- Disable Large Send Offload v2

My wifi adapter does not support this feature

- Get rid of Microsoft OneNote

Right-click Windows logo > Windows PowerShell (Admin)

Get-AppxPackage *OneNote* | Remove-AppxPackage
How To Speed Up Internet On Windows 10? 16 Ways Available [MiniTool News]

https://www.minitool.com/news/increase-internet-speed-windows-10.html

- Disable background apps
- Disable P2P downloads (AKA ‘Delivery Optimization’)
- Turn off metered connection
- Delete Temporary Files – Ccleaner and Glary Utilities took care of that
- Modify DNS
Apparently 208.67.222.222 and 208.67.220.220 are alternatives to Google’s DNS

Other steps are:
Flush the DNS cache
• Change Wi-Fi password
• Download one thing at a time
• Switch to another web browser
• Remove Microsoft OneNote
• Remove viruses and malware
• Disable Large Send Offload v2 (IPv4)
• Disable Window Auto-Tuning
• Install/update the official network drivers
• Disable automatic Windows updates
• Use a download manager

Which are the same steps as the previous article, which means MiniTool News cribbed from the previous author, or they both cribbed from a common source.

(Solved) Windows 10 Download Speeds VERY SLOW

https://social.technet.microsoft.com/Forums/en-US/22eb91b7-ba4f-4ede-85b6-baadb86362ae/solved-windows-10-download-speeds-very-slow

Downloaded nvspbind.exe from https://api.256file.com/nvspbind.exe/m-download-172640.html

Installed nvsp.exe to C:\Windows\SysWow64\

Ran batch file with admin privileges containing the following commands:

.\nvspbind.exe /d * ms_server
.\nvspbind.exe /d * ms_rdma_ndk
.\nvspbind.exe /d * ms_implat
.\nvspbind.exe /d * ms_netbios
.\nvspbind.exe /d * ms_lldp
.\nvspbind.exe /d * ms_tcpip6
.\nvspbind.exe /d * ms_pppoe
.\nvspbind.exe /d * ms_lltdio
.\nvspbind.exe /d * ms_server
.\nvspbind.exe /d * ms_netbt
.\nvspbind.exe /d * ms_msclient
.\nvspbind.exe /d * ms_ndiswan
.\nvspbind.exe /d * ms_pacer
.\nvspbind.exe /d * ms_ndiscap

- Did a scan with Malwarebytes FREE, 0 threats detected

- Did Windows Defender manual scan of C:\

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THANK YOU very much for reading this far!
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Anything else I could try?

I am about to reinstall Windows 10, but that means reinstalling all my apps and settings as well.
Before I do that, I look towards my fellow PC users to suggest something I have not yet considered.