Canon WFT-E1 Network Setup Manual page 12

Changing Firewall Settings
This section is only for people using Windows XP Service Pack 2 or a higher
version.
With Windows XP Service Pack 2, images may not be transferred if the Windows firewall
is on, so you need to change the settings of the Windows firewall.
[Start] button
1
Double-click [Windows Firewall].
2
[Windows Firewall] will appear.
Select [ On (recommended)]
12
Select [Control Panel].