I have a HP photosmart C6180 all-in-one and I am trying to scan a picture onto the computer but every time I go to the scan menu it says Error: Sorry, scanner could not be initialized. (Scanner not found.)

I get this every now and then, usually because, during a scan, I abort for some reason--reset the computer, force-quit, whatever.  The printer driver, I think, leaves some breadcrumbs that it can't recover from when it runs again.
Anyway, I reset the printing system and install the latest HP driver.  If that doesn't work, I delete the HP folder in the Applications folder; then remove whatever files I can find in the /Library folder such as Application Support/Hewlett-Packard, Application Support/HP, any HP file in Preferences, Image Capture/TWAIN Data Sources/HPScanPro.ds.
Then reinstall the driver and things work fine.  I'm thinking this last item, the HPScanPro.ds in the TWAIN folder might be the culprit but I haven't tried just remove it alone--after I remove everything things work so I can't "try it again"...and don't want to!  =)
Anyway, I've had success with this method.  Good luck!

I get this every now and then, usually because, during a scan, I abort for some reason--reset the computer, force-quit, whatever.  The printer driver, I think, leaves some breadcrumbs that it can't recover from when it runs again.
Anyway, I reset the printing system and install the latest HP driver.  If that doesn't work, I delete the HP folder in the Applications folder; then remove whatever files I can find in the /Library folder such as Application Support/Hewlett-Packard, Application Support/HP, any HP file in Preferences, Image Capture/TWAIN Data Sources/HPScanPro.ds.
Then reinstall the driver and things work fine.  I'm thinking this last item, the HPScanPro.ds in the TWAIN folder might be the culprit but I haven't tried just remove it alone--after I remove everything things work so I can't "try it again"...and don't want to!  =)
Anyway, I've had success with this method.  Good luck!