Internet speed slowdown after Windows 22h2 update

Aristippus
edited November 2022 in Install & Updates

I have two identical computers, one running Windows 11 22H1 and the other Windows 11 22h2. That is the only difference. Both run Bitdefender Total Security in identical configurations. After the update of the second computer three weeks ago I noticed a severe degradation in internet speeds from around 950 mbs to around 195 mbs. To set the stage, I am in IT and I have several Cisco certifications including the CCNP and I have over 20 years experience as a network specialist. OK, troubleshooting began, first the router, then the switches, then the Provider gear, then the darn cables. All ok. Remove network drivers and reinstall, nothing. Then investigate the differences between 22H1 and 22H2, found the large file download bug but that's not it. OK, firewall rules, all good. Remove any traces of VPN drivers, no difference. At this point I give up and decide to remove 22H2 and reload Windows 11 plain, start with removing BitDefender and on a hunch try the internet speed, damn, 950 mbs, what? Reload Bitdefender Total Security with all defaults and remove traces of VPN. Speedtest, 195 mbs. Remove BitDefender, back to 950 mbs. It is definitely something in 22H2 that clashes with Bitdefender, remember that my 22H1 PC does not exhibit this behavior. But what? I tried shutting down only the firewall but the internet speeds still remain low, only completely removing Bitdefender fixes the issue. Any ideas?

Comments

  • Gjoksi
    Gjoksi Defender of the year 2022 mod

    Hello.

    -- STEP 1 --

    Repair Bitdefender, by following these steps:

    -- STEP 2 --

    If the instructions from Step 1 didn't help, uninstall the Bitdefender program using the Uninstall Tool:

    It will completely remove the program.

    Next, reinstall Bitdefender from your Bitdefender Central account and see if the issue has been solved, as reinstalling the program usually solves the issues.

    -- STEP 3 --

    If the instructions from Step 2 didn't help, follow the instructions in this step.

    First, take screenshot(s) of the issue,

    create a log file on your Windows device using Bitdefender Support Tool, by following these steps:

    and

    create a connectivity log file, by following these steps:

    Next, contact Bitdefender Consumer Support by e-mail:

    with short description of the issue.

    After that, you will get an automated reply by the Bitdefender Customer Care Team, with your ticket number.

    Now, in reply to that automated reply, you can send the screenshot(s) you already took and the log files you already created.

    Since you are all done, just wait for the support engineers to investigate your issue and find a solution to fix the issue.

    Remember that the screenshot(s) and the log files will help a lot to the support engineers for better and faster investigation on your issue and finding a solution.

    Regards.

    Win10Pro22H2x64-TotalSecurity26.0.32.123-Firefox109.0.1

    Android13-PatchNov1,2022-MobileSecurity3.3.195.2164-Central3.1.10.89

  • Flexx
    Flexx Moderator, Defender of the month mod

    Also have a look at below stated link provided by bitdefender support

    https://www.bitdefender.com/consumer/support/answer/3766/

    Additionally, open an elevated command prompt as an administrator and run the below stated commands one by one and press enter

    ipconfig/flushdns

    ipconfig /registerdns

    ipconfig /release

    ipconfig /renew

    netsh winsock reset

    netsh int ip reset

    ipconfig /flushdns

    ipconfig /registerdns

    netsh int tcp set heuristics disabled

    netsh int tcp set global autotuninglevel=disabled

    netsh int tcp set global rss=enabled

    netsh int tcp show global

    Regards

    OMEN Laptop 15-en1037AX (Bitdefender Total Security) & Samsung Galaxy S22 Ultra (Bitdefender Mobile Security)

  • Aristippus
    edited November 2022

    All steps taken

    Win 11 22H2 computer before BitDefender install

    Win 11 22H2 computer after BitDefender install

    Win 11 22H2 computer after full uninstall of BitDefender

    Win 11 22H1 computer on same network switch and router WITH Bitdefender fully installed and identical configuration


  • Flexx
    Flexx Moderator, Defender of the month mod
    edited November 2022

    Can you perform below stated steps, if possible.

    1) Install Bitdefender.

    2) Temporarily disable Bitdefender Protection: https://www.bitdefender.com/consumer/support/answer/28557/

    3) Check internet connectivity speed on speedtest.net and share the screenshot.

    4) Re-enable real time protection in Bitdefender.

    If issue persists,

    Generate bitdefender support tool logs (https://www.bitdefender.com/consumer/support/answer/1733/)

    Generate bitdefender connectivity logs (https://www.bitdefender.com/consumer/support/answer/9689/)

    Share the logs & your query with bitdefender support team by dropping them an email at [email protected]

    The support team will reply back to your query within next 24-48 hours excluding weekends.

    Regards

    OMEN Laptop 15-en1037AX (Bitdefender Total Security) & Samsung Galaxy S22 Ultra (Bitdefender Mobile Security)