Windows 10: Slow WiFi speed on PC only

Discus and support Slow WiFi speed on PC only in Windows 10 Network and Sharing to solve the problem; a week before the problem occurred i had just upgraded to NBN and was fine for the first few days then every device in the house slowed down after this... Discussion in 'Windows 10 Network and Sharing' started by DylanBirkin, Jul 21, 2019.

  1. DYLANBIRKIN
    DylanBirkin Win User

    Slow WiFi speed on PC only


    a week before the problem occurred i had just upgraded to NBN and was fine for the first few days then every device in the house slowed down after this was fixed the PC was the only device that still had very slow speeds.


    Since every device was working fine with NBN and the PC was the only device have WiFi Problems i thought the Problem was with the Network Adapters so i tried using a Ethernet cord and also buy a different Network Adapter all of these solutions did not work and still had very slow speeds.


    Currently the PC speed is 0.25 mps download and 1.09mps upload while other devices are reaching speeds of 44.3 mps download and 17.1 mps upload.


    If anyone has and ideas of how to fix this problem it would be much appreciated

    ​


    :)
     
    DylanBirkin, Jul 21, 2019
    #1
  2. KENT ONG KEAN SENG
    Kent Ong Kean Seng Win User

    Slow Internet Over Wifi. Only Internet Speed Weirdly Slowed.

    Hi, Microsoft.

    Wireless Environment Details

    Previously, I am using Windows 7 and upgraded to Windows 10 in my Dell laptop with overall environment details as below,

    • Intel® Dual Band Wireless-AC 3165 Wifi adapter, using 5Ghz band at 433Mbps.
    • Using Asus RT-AC68U, performing 600Mbps (2.4GHz) + 1300Mbps (5GHz).
    • Subscribing fiber optic 300Mbps ISP speed.
    Problem Statements

    I am facing internet speed throttled over Wifi but not wired LAN connection. The speed throttled below than 100Mbps during downloading. The Wifi weirdly throttled the internet speed only but not local network file transfer over wireless.

    Test Methods and Problem Analysis.

    • The laptop and router range within 2 meters away.
    • No multiple devices connected to the router during the test.
    • DNS set in router is Google's DNS, 8.8.8.8
    • My laptop using default Windows 10 Firewall and set network to "Private".
    • No VPN were used nor installed.
    • All hardwares installed with latest drivers from Dell website.
    • All networking speed monitored using Resource Monitor.
    • Download files from internet into laptop over LAN cable. Full speed at 300Mbps.
    • Download files from internet into laptop over Wifi. Speed slowed down less than 100Mbps.
    • I have a desktop PC too, using Windows 10 and LAN cable connection to router.
    • Transferring files from desktop PC to Asus router and finally wireless to my laptop.
      FULL SPEED around 400Mbps.
    • This is so odd. Wireless file transfer over local network can be full speed but internet over wireless slowed. Obviously not Wifi adapter problem.
    • I decided to further test the router hardware.
    • Download files from internet into desktop PC over LAN cable. Full speed at 300Mbps.
    • Download files from internet over smartphone and tablet (both Android and iOS) wireless.
      FULL SPEED at 300Mbps. Obviously not router problem too.
    • So I narrowed down the problem only can be Windows 10. Can you help me identify the problems?
     
    Kent Ong Kean Seng, Jul 21, 2019
    #2
  3. JIMMY_855
    jimmy_855 Win User
    WiFi is very slow, there is no way to speed?

    WiFi is very slow, there is no way to
    speed?
     
    jimmy_855, Jul 21, 2019
    #3
  4. KENT ONG KEAN SENG
    Kent Ong Kean Seng Win User

    Slow WiFi speed on PC only

    Slow Internet Over Wifi. Only Internet Speed Weirdly Slowed.

    Hi, Stephanie Sal

    Thank you for the reply promptly. I believe I should apologize that I missed out a few more details to make the troubleshooting easier. Before I further explain, I did thoroughly read and done the troubleshooting steps that you provided but the problem still
    persist. Here is the details,

    • I did the internet test speed (www.speedtest.net) using Edge internet browser, is does gave me full speed. Like picture below.

    • Slow WiFi speed on PC only 51514007-597c-4b86-bcf4-872497d75c2d.jpg
    • Even I installed the Ookla Speed Test app from Store, it show the internet still giving full speed.

    • Slow WiFi speed on PC only d79c107c-65f1-4574-8677-7b3af5e8c0aa.jpg
    • When I download games from Origin, Steam, Battle.net and Uplay. They simply did not download at full speed over Wifi. Example below is the screenshot of Steam download over Wifi, maximum speed around 60Mbps to 70Mbps.

    • Slow WiFi speed on PC only [​IMG]
    • Now, the screenshot below is the Steam download over LAN cable. The speed is fairly fast. The speed did not reach at 30MB/s because the bottle neck from HDD but it will reach >30MB/s at my desktop PC (SSD).

    • Slow WiFi speed on PC only [​IMG]
    • I don't think Wifi interference, Firewall, or Anti-virus are the blame here because the speed test can reach full speed but game download is slowed.
    • Is Windows 10 handling network management by deprioritize certain applications?
     
    Kent Ong Kean Seng, Jul 21, 2019
    #4
Thema:

Slow WiFi speed on PC only

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