Logos 4 Windows Is Hanging Right After Startup

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WPF Presentation Font Cache

The most common cause of a hang right after the main window is displayed is corruption in the WPF Presentation Font Cache. To resolve the issue:

  1. Stop the font cache service
    • Start > Run: services.msc (or start Task Manager, select the Services tab and click Services/Open Services at the bottom)
    • Find “Windows Presentation Foundation Font Cache” in the list.
    • Choose Action > Stop on the menu.
  2. Delete the cache file (FontCache3.0.0.0.dat) in:
    • Windows Vista/7/8: C:\Windows\ServiceProfiles\LocalService\AppData\Local
    • Windows XP: C:\Documents and Settings\LocalService\Local Settings\Application Data
  3. Reboot the computer

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