Check 1: Restart the computer.
Check 2: Follow the steps below to make sure that the machine is recognized by the computer, and if not, reinstall ScanGear (scanner driver).
Step 1: Confirm.
Windows 7/Windows Vista:
On the Start menu, right-click Computer, then select Properties.
Select Device Manager on the upper left of the screen.
Windows XP:
On the Start menu, right-click My Computer, then select Properties.
On the Hardware tab, select Device Manager.
The machine is displayed under "Imaging devices."

The machine is not displayed. ("CanoScan" may be displayed under "Other devices.")

Step 2: Delete ScanGear.
From the Start menu, select All Programs > CanoScan (model name) > Scanner Driver Uninstaller.
NoteIn Windows 7 and Windows Vista, a confirmation or warning dialog box may appear while installing, uninstalling or starting software.
This dialog box appears when administrative rights are required to perform a task.
If you are logged on to an administrator account, click Yes (Continue or Allow in Windows Vista) to continue.
Some applications require administrator account to continue. If you are logged on to a standard account, switch to an administrator account and start over.
When the Scanner Driver Uninstaller dialog box opens, click Execute.
When a confirmation appears, click Yes.
When all files are deleted, click Complete.
ScanGear is deleted.
Step 3: Reinstall ScanGear.
Insert the Setup CD-ROM into the computer's disc drive, click Custom Install, select the ScanGear checkbox and reinstall it.

NoteDeselect the checkboxes to the left of applications that are already installed. These applications will not be reinstalled.