Environment
- Microsoft Windows: All Supported Versions
Objective
Files may be blocked by default by Windows Local Group Policy when downloaded from the internet.
Resolution
How To Unblock Manually:
- Go to Downloads
- Locate the downloaded file
- Right-click on the file and select Properties from the menu
- Click Unblock on the General tab
- Click OK
How To Unblock Via Group Policy (not recommended)
- Open the Local Group Policy Editor (gpedit.msc)
- Browse to: User Configuration > Administrative Templates > Windows Components > Attachment Manager
- Locate the policy for: Do not preserve zone information in file attachments
- Choose to 'Enable' the policy and click OK
- As the description explains, if you enable this policy setting, Windows does not mark the file attachments with their zone information.
- Restart the machine.
Additional Notes
- Perform this check as soon as the file is downloaded and prior to extraction
- Unblocking zip files (and other files as well) ensures that there are no issues with the files once extracted and installed
- This is not a way to bypass functionality of Cb Defense, Cb Response, or Cb Protection
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