When attempting to remove the Sophos Anti-Virus component from Add/Remove Programs you see the error:
Error 3003. You must uninstall the Sophos Client Firewall before uninstalling Sophos Anti-Virus.
Known to apply to the following Sophos product(s) and version(s)
Sophos Client Firewall
Sophos Anti-Virus for Windows 2000+
- The Sophos Client Firewall is still listed in Add/Remove Programs and needs to be removed first. The Sophos Client Firewall depends on the Anti-Virus component and cannot exist without it.
- The registry key
HKLM\Software\Sophos\Sophos Client Firewall has been detected by the Sophos Anti-Virus uninstaller.
What to do
You should remove the Sophos Client Firewall from Add/Remove Programs before uninstalling the Sophos Anti-Virus component.
If the error appears when the Sophos Client Firewall is not listed in Add/Remove Program rename the following registry key.
- Open the registry editor (Start | Run | Type: regedit.exe | Press return).
- Browse to the key:
HKLM\Software\Sophos\Sophos Client Firewall
- Right-click the key and export as a .reg file to a safe location.
- Rename the key to:
HKLM\Software\Sophos\Sophos Client Firewall.old
- Close the registry editor.
You should now be able to uninstall the Sophos Anti-Virus component.