Microsoft Outlook Error- An unknown error occurred, error code: 0x80070003

This issue is caused from changing or moving the location of your my documents folder. This applies to Microsoft Outlook 2007 / 2010

The notes below relate to OS Windows Vista / Windows 7

Step 1  –

Delete your outlook profile in Control Panel\Mail. This will not delete emails etc only settings, so if you don’t know them of heart i suggest making some note first

Step 3 –

Then run REGEDIT

Navigate to – HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\

Delete all files in these folders




Step 4 –

Rename this folder in your profile


Step 5 –

Add all your mail settings back in and restart Outlook


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