I tried multiple USB cables, I fiddled with the auto-start switch on my scanner, I tried using power over USB and power from the wall, I tried changing which port the USB was plugged into on the computer (front ports, back ports, USB 2.0, USB 3.0, USB 1.0), I tried unplugging other USB devices to decrease the number of devices on the bus, I tried reinstalling the driver, I upgraded the driver, I disabled the driver and re-enabled it, I fiddled with the start-up settings for CaptureOnTouch, added a 'ServicesPipeTimeout' setting in regedit, unplugged and re-plugged the USB cable, and probably some more things that I can't remember. I tried everything I could find to fix this problem except for (a) replace my canon p-150 and (b) switch computers. Solutions I already tried that did not work: And now, (last 3 days), I couldn't get the scanner to work. (about 3 weeks ago) I had to reboot he computer multiple times. After the Windows 10 update, I was having to reboot the computer every time I needed to use the scanner. Fast forward a couple of years and Microsoft eventually got me to upgrade to Windows 10. I searched the internet for a solution and when I couldn't find one I resigned myself to rebooting the computer every once in a while. When this problem first popped up, all I needed to do was reboot my computer and everything would work. Check that another application is not using the device."
Occasionally I would try to use the scanner after being away from the computer for a while and I would get "Error -4630: The device could not be locked. Back then, my computer was running windows 7. When I first setup the scanner it worked perfectly for some time. It is an inexpensive multisheet duplex scanner. I feel compelled to share my solution and I hope it works for you. For 4 years I have been dealing with this problem! I finally found a SOLUTION!!! I have read this thread at least 40 times hoping someone would post a solution that would work for me.
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