adnxs.com - Malware or just a strange-named cookie?

There are a few ways that the Adnxs.com cookie could get into your system. One possibility is that you visited a website that uses the Adnxs advertising network. When you visit a website that uses Adnxs, the Adnxs cookie is placed on your computer. This cookie allows Adnxs to track your online activity and display targeted ads to you.

Another possibility is that you clicked on an ad that was served by the Adnxs advertising network. When you click on an ad that is served by Adnxs, the Adnxs cookie is placed on your computer. This cookie allows Adnxs to track your online activity and display targeted ads to you.

If you are concerned about the Adnxs.com cookie, you can remove it from your computer by clearing your browser's cookies and cache. You can also opt out of interest-based advertising from Adnxs by visiting their website.

Please check if the following steps help you:

1) Restart your PC in safe mode: https://support.microsoft.com/en-us/windows/start-your-pc-in-safe-mode-in-windows-92c27cff-db89-8644-1ce4-b3e5e56fe234

2) Open the Run command and execute the following commands one by one:

temp ,delete all the files in the the folder

%temp% ,delete all the files in the folder

prefetch ,delete all the files in the folder

3) Restart your PC in normal mode by unselecting the option to run the system in Safe Mode and then click 'Apply.

4) Reset your we browsers:

Google Chrome: https://support.google.com/chrome/answer/3296214?hl=en

Mozilla Firefox: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings

Microsoft Edge: https://malwaretips.com/blogs/reset-microsoft-edge/

Opera: https://browsersolution.com/reset-opera-browser

Vivaldi: https://help.vivaldi.com/desktop/install-update/full-reset-of-vivaldi/

Brave: https://support.brave.com/hc/en-us/articles/360017903152-How-do-I-reset-Brave-settings-to-default-

5) Reset the windows host file to default: https://support.microsoft.com/en-us/topic/how-to-reset-the-hosts-file-back-to-the-default-c2a43f9d-e176-c6f3-e4ef-3500277a6dae

6) Run Disk Cleanup: https://support.microsoft.com/en-us/windows/disk-cleanup-in-windows-8a96ff42-5751-39ad-23d6-434b4d5b9a68

This should deal with all type of invalid cookies stored on your system and the changes that they might have made to your web browser.

Regards