Windowblinds Has Detected A Problem With Core Files New Link

Suggested article: “'WindowBlinds has detected a problem with core files: 'new' — causes and fixes”

Summary

Many users see the error message “WindowBlinds has detected a problem with core files new” when WindowBlinds fails to load skins or apply themes. The message typically indicates corrupted or incompatible core files, missing dependencies, or conflicts with system updates or other theming utilities.

Disable Antivirus Temporarily
Real-time protection (especially Avast, McAfee, or Defender) can flag WindowBlinds’ injection methods. Add the entire Stardock folder to your antivirus exclusions. windowblinds has detected a problem with core files new

Run the official “SFCfix” or Core Repair Tool
Stardock provides a small utility called WindowBlinds_Core_Repair.exe (available on their support site). It restores missing/corrupt core files without a full reinstall. Add the entire Stardock folder to your antivirus

or Windows' own Ransomware Protection can block WindowBlinds core files from running. : Add an exclusion for wbcore.exe or Windows' own Ransomware Protection can block WindowBlinds

When the software launches (either at startup or when you click "Apply a skin"), it runs a checksum verification on these files. If the checksum fails—meaning the files are corrupted, missing, tampered with, or incompatible with a recent Windows Update—the error triggers.