keep getting this popup when i start my pc only started yesterday 23/06/2026

Bonjour is a legitimate networking component from Apple that is often installed with iTunes, iCloud, or other Apple software. The file mdnsNSP.dll in C:\Program Files\Bonjour\ is part of that software, not inherently malware.

However, unexplained popups can sometimes be triggered by deceptive or unwanted software, so it is safer to clean up anything not needed and check for adware or malware.

Recommended steps:

1. Uninstall Bonjour if not needed
   • Press the Windows key, type Control Panel, and open it.
   • Select Programs → Programs and Features.
   • Look for Bonjour or other Apple-related components that are not needed.
   • Select the entry and click Uninstall, then follow the prompts.
   • Restart the PC and check if the popup still appears.
2. Remove other suspicious or unwanted programs
   • In Programs and Features, review the installed programs list.
   • Uninstall software that is not recognized or that is associated with unwanted behavior, using caution not to remove components that are required by other software.
3. Scan for deceptive software / adware
   • Open Windows Security → Virus & threat protection and run a Full scan.
   • If any threats are found, follow the recommended actions to remove them.
4. Check browser popups and extensions (if the popup appears when opening a browser)
   • In Microsoft Edge, go to Settings → Cookies and site permissions → Notifications and block or remove suspicious sites.
   • Go to edge://extensions/ and remove any extensions that are not recognized or that cause popups.

If the popup continues after uninstalling Bonjour and scanning for malware, the issue may be with a leftover startup entry or a misconfigured program that still references mdnsNSP.dll. In that case, continue removing any related Apple or adware software from Programs and Features and re-run the malware scan.

References:

• Unexplained Windows or software behavior may be caused by deceptive software
• possible virus, computer locked - Microsoft Q&A
• How to stop Total add block from popping up in all my apps and banking - Microsoft Q&A
• Microsoft Defender Scam or Do I have a virus on my computer - Microsoft Q&A
• Windows defender scam - Microsoft Q&A