References: http://support.microsoft.com/kb/305982/en-US http://www.technipages.com/outlook-cant-create-file-error-when-opening-attachment 1. Run REGEDIT.EXE 2. Navigate to "HKCU\Software\Microsoft\Office\14.0\Security" 3. On the right-pane, double click "OutlookSecureTempFolder" 4. Copy the value of OutlookSecureTempFolder 5. Open File Explorer 6. Paste the value onto addressbar, press enter 7. Delete all the content of that folder 8. Restart Outlook
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