Removing the “Outlook blocked access to the following potentially unsafe attachments” message in Outlook
1. Exit Outlook if it is running. 2. Click Start, click Run, type regedit, and then click OK. 3. Verify that the following registry key for your version of Outlook exists. If it does, go to step 5. Microsoft Office Outlook 2007 HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookSecurity Microsoft Office Outlook 2003 HKEY_CURRENT_USERSoftwareMicrosoftOffice11.0OutlookSecurity Microsoft Outlook 2002 HKEY_CURRENT_USERSoftwareMicrosoftOffice10.0OutlookSecurity Microsoft Outlook 2000