Canon MX870 Series User Manual page 1114

Right-click Computer, select Properties, then click Change settings.
1.
In Windows XP, right-click My Computer, then select Properties.
Click the Computer Name tab, then click Change.
2.
Change the workgroup name to "WORKGROUP", then click OK.
3.
Check 6: Disconnect the network drive for the Card Slot and mount it
again following the procedure below.
Right-click Computer (or My Computer), and select Disconnect Network Drive.
1.
Select the network drive to disconnect, then click OK.
2.
Remount the Card Slot using the Canon IJ Network Tool.
3.
Using the Card Slot over a Network
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