| Problem | Likely Cause | Fix | | :--- | :--- | :--- | | "Provider not registered" error in 32-bit app | ACE engine missing or 64-bit version installed | Uninstall any 64-bit ACE or Office; Install 32-bit ACE. | | Excel cannot import .accdb file | Office is 64-bit, ACE is 32-bit | This is an architectural mismatch. Use 64-bit ACE or switch Office to 32-bit. | | Installation hangs at "Configuring..." | Antivirus or pending Windows Update | Temporarily disable real-time scanning, complete all Windows Updates, then retry. | | Missing MAPI or Outlook components | Interference with Outlook | Re-install Office "Repair" option after installing ACE. |
He double-clicked the installer.
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