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Windows SmartScreen

Windows SmartScreen may warn when an installer is new, unsigned, or has not built reputation. This page explains why the warning appears and how to respond safely.

Why SmartScreen Appears

SmartScreen evaluates two independent factors:

  1. Certificate reputation — The installer is signed with a code-signing certificate. Until TraceWall obtains an Extended Validation (EV) certificate or a standard certificate with accumulated reputation, SmartScreen treats the publisher as “Unknown”.
  2. File reputation — SmartScreen checks the file hash against Microsoft’s cloud reputation service. New releases have zero reputation by default.

Neither factor indicates malware. A missing signature or low reputation only means the file is new or the publisher hasn’t yet established trust in Microsoft’s ecosystem.

What the Warning Looks Like

SmartScreen Dialog (Windows 10/11)

Windows protected your PC
Microsoft Defender SmartScreen prevented an unrecognized app from starting.
Running this app might put your PC at risk.
App: TraceWall-Desktop-V3-x.x.x-Setup.exe
Publisher: Unknown publisher

SmartScreen in Microsoft Edge / Chrome

This file is not commonly downloaded and may be dangerous.
TraceWall-Desktop-V3-x.x.x-Setup.exe was blocked because it could harm your device.
  1. Confirm the source — The file must come from https://download.trace-wall.com/ or a link explicitly provided in official TraceWall communications. Do not run installers from email attachments, third-party mirrors, or shared drives.

  2. Verify the version — Match the filename version (e.g., V3.1.0) to the current release published on the download page and in the Changelog.

  3. Verify the SHA-256 checksum — This is the single strongest control.

    PowerShell:

    Terminal window
    Get-FileHash ".\TraceWall-Desktop-V3-x.x.x-Setup.exe" -Algorithm SHA256

    Command Prompt:

    Terminal window
    certutil -hashfile "TraceWall-Desktop-V3-x.x.x-Setup.exe" SHA256

    Compare the output exactly (case-insensitive) to the checksum published on the download page and in the release notes.

  4. Check the digital signature (Properties → Digital Signatures) — Right-click the installer → Properties → Digital Signatures.

    • If the list is empty: the file is unsigned (expected for current releases).
    • If a signature exists: double-click it → View Certificate → verify the Subject matches TraceWall and the certificate chain is valid.
  5. Proceed only if all checks pass — Click More infoRun anyway (SmartScreen dialog) or KeepShow moreKeep anyway (browser download).

  6. Report anomalies — If the checksum mismatches, the signature shows an unexpected publisher, or the download URL differs from download.trace-wall.com, do not run the file. Contact TraceWall support immediately.

What Not To Do

ActionWhy It’s Unsafe
Disable SmartScreen globallyRemoves protection for all future downloads
Disable Windows Defender / Real-time protectionExposes the system to actual malware
Lower UAC levelReduces consent prompts for system changes
”Run anyway” without checksum verificationBypasses the only cryptographic integrity check
Download from a non-official linkSupply-chain compromise risk

For IT / Security Teams

  • Allowlist by hash — Add the verified SHA-256 to your application control policy (AppLocker, WDAC, Intune, etc.) instead of path or publisher rules.
  • Deploy via managed installer — Use your software distribution system (SCCM, Intune, Chocolatey, Winget) with the verified hash pinned.
  • Monitor SmartScreen events — Event Viewer → Applications and Services Logs → Microsoft → Windows → SmartScreen → Operational (Event ID 1001, 1002).

Future State

TraceWall plans to obtain a commercial code-signing certificate (EV preferred) for the Windows installer. Once signed and reputation is established:

  • SmartScreen warnings will cease automatically.
  • The Digital Signatures tab will show a valid TraceWall certificate.
  • This page will be updated with the certificate details and verification steps.