Alert: Do Not Delete the New inetpub Folder in Windows 11

Windows 11 KB5055523 Update and the Mysterious inetpub Folder: Should You Worry?

After installing the April 2025 Patch Tuesday update (KB5055523) on your Windows 11 (version 24H2) system, did a new inetpub folder suddenly appear on your C: drive? This article clarifies its purpose and addresses common concerns.

The inetpub folder, typically associated with Internet Information Services (IIS), a web server component of Windows, might appear empty (zero bytes) after the update. Interestingly, it can appear even if IIS isn't installed or enabled. This has understandably raised questions about its safety and necessity.

Why the inetpub Folder?

The appearance of this folder is directly linked to the security patch for CVE-2025-21204, a critical privilege escalation vulnerability. Microsoft's security update includes the inetpub folder as a preventative measure against this vulnerability, which could allow local privilege escalation via manipulated symbolic or hard links.

Should You Delete the inetpub Folder?

No, deleting the inetpub folder is strongly discouraged. It's a crucial part of the enhanced security measures implemented by the update. Even if deleted, it might be automatically recreated by the system.

Accidentally Deleted? Here's How to Restore:

If you've already deleted the folder, you can recreate it by enabling IIS:

1. Open Control Panel (search for it in the Windows search bar). Ensure "View by" is set to "Category."
2. Go to Programs > Turn Windows features on or off.
3. Check the box for Internet Information Services and click OK. The inetpub folder should reappear.

Proactive PC Protection: Backups

Maintaining your PC's security involves understanding system changes and regularly backing up your files and system. Tools like MiniTool ShadowMaker provide comprehensive backup solutions for Windows, protecting your data during updates, cleanup, or other system operations.

In Conclusion:

The inetpub folder created by KB5055523 is a security enhancement, not a threat. Leave it alone for optimal system protection.

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