When plugging in a Canon CanoScan 9000F, driver installation failed, and so I looked at the log file C:\Windows\inf\setupapi.dev.log: The file usbscan.sys could not be found in C:\Windows\inf.

So I searched for the file, and found it in a multitude of locations. From C:\Windows\System32 I copied it to C:\Windows\INF, and now installation of the Canon driver works.

But why did I have to manually copy usbscan.sys? Did the installer look in the wrong location, or has the file been deleted before?

I wonder if there is something broken on my system.

When plugging in a Canon CanoScan 9000F, driver installation failed, and so I looked at the log file C:\Windows\inf\setupapi.dev.log: The file usbscan.sys could not be found in C:\Windows\inf.

So I searched for the file, and found it in a multitude of locations. From C:\Windows\System32 I copied it to C:\Windows\inf, and now installation of the Canon driver works.

But why did I have to manually copy usbscan.sys? Did the installer look in the wrong location, or has the file been deleted before?

I wonder if there is something broken on my system.