I'm using a Canon MX300 under Windows XP SP3 and the scanner has stopped working. Canon tech support is useless. The problem is when I try to scan I get the following message: The scanner driver supported by this software is not installed. Install it and then retry. I've been using this printer/scanner for about 3 years on the same computer and it has worked fine until recently. It does print, but it will not scan. I tried uninstalling all the software and then reinstalling it from the CD that came with the printer. I get the same error message. I tried to update the drivers and get the same error message. Any suggestions would be greatly appreciated! Thank you.