Internet speed slowdown after Windows 22h2 update

Aristippus · November 2022

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?

Gjoksi · November 2022

Hello.

-- STEP 1 --

Repair Bitdefender, by following these steps:

https://www.bitdefender.com/consumer/support/answer/13429/

-- STEP 2 --

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

https://www.bitdefender.com/links/uninstall_consumer_paid.html

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:

https://www.bitdefender.com/consumer/support/answer/1733/

and

create a connectivity log file, by following these steps:

https://www.bitdefender.com/consumer/support/answer/9689/

Next, contact Bitdefender Consumer Support by e-mail:

https://www.bitdefender.com/consumer/support/help/

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.