HP Scanjet 4890 and MBP - HP software crashes

Question

I bought this Scanjet via Applestore.
It was easy to set up. It will happily scan a small photo and it will also work, using the HP copy utility, as a photocopier with my HP printer via the MBP.
However, if I try to scan a whole A4 page of handwriting, it crashes during the save stage (wanted to PDF the page so I could email it). This happens regardless of whether you change to greyscale, to black and white, to a different resolution.
Presumably it would like more memory... Anyone here know anything about the HP scanjet/Photosmart software and what might cause it to crash in this way when other functions are OK? I have posted on the HP site and if I get anything back from them I'll post it here.
Imogen

Answer 1

This reply from HP email support solved my problem. I thought that their technical support was very good, better than Apple's.
Dear Imogen,
Thank you for contacting HP Total Care.
I am sending you steps to do a manual uninstall for the scanjet. Please
read the NOTE at the end very carefully.
Unplug the USB cable before starting the uninstall.
To complete a full uninstall in OS 10 or higher, refer to the steps
below:
Run the Uninstaller application:
Open the Macintosh Hard Drive. (Usually displayed as MAC HD)
Open the Applications folder.
Open the Hewlett-Packard folder.
Open the HP Photo and Imaging Software folder.
Open the HP Uninstaller application.
Select Uninstall All Products, click Next, and then click uninstall.
Open the Hard Drive/Library/Preferences
*drag the loginwindow.plist to the desktop
Removing login items:
Open the Apple menu by clicking on the apple icon located at the top of
your screen.
Open System Preferences.
Open Accounts.
Open Login Items.
Highlight the HP Scanjet Manager, and then click Remove.
Restart the Macintosh.
Removing preferences from the User Profile:
Open the Macintosh hard drive. (This is usually labeled Macintosh HD)
Open the User's folder.
Select the home user(This will be shown with a house icon next to it).
Open the Library folder.
Open the Preferences folder.
In the Preferences folder, locate and remove all of the following
preferences:
com.hp.photo.director.plist
com.hp.scanjet.pro.plist
com.hp.photo.gallery.plist
HP PS Pro Preferences
HP Scanjet Button Preferences
HP Scanjet Destinations
HP Scanjet Copy
hpEmailPrefs
Drag these files to the Trash.
Removing application support:
Open your Macintosh hard drive (Usually titled "Macintosh HD".
Open the Library folder.
Open the Application Support folder.
Drag the HP folder to the trash.
Removing extensions:
Open the Macintosh hard drive (this is usually labeled as 'Macintosh
HD').
Open the System folder.
Open the Library folder.
Highlight the Extensions folder.
Simultaneously press the Apple Key + I.
In the window that displays, click the arrow beside Ownership and
Permissions.
Click the Lock icon to unlock permissions.
Click Owner.
Click your current username, which should have 'me' in brackets next to
the name.
Within the Extensions folder, locate the files hpAccess.bundle and
hpPlugInInit.kext and drag them to the Trash.
Empty the trash.
Click on the Lock icon to lock the permissions.
Do a Repair Disk Permissions. To do so, open the Hard
Drive/Applications/Utilities/Disk Utility. Select your hard drive on the
left had side. Make sure First Aid tab near the top has been selected.
Click on Verify Disk Permissions. Wait until you get a message stating
it is done. Click on Repair Disk Permissions. Wait until you get a
message stating it is done.
NOTE: Once the uninstall has been completed, unplug the power cord from
the scanner before installing the new driver. Once the installer is
complete, you will receive a message stating that the software has been
successfully installed. Select quit and allow the Macintosh to restart.
Once the Macintosh restarts, plug in the USB cable followed by the power
cord. RESTART THE COMPUTER before running a test scan.
Here is the link for the latest drivers. Please go to Step 3 and select
Download Only. When the download is complete, close all applications and
programs. You should have a new Icon on your desktop. Double click on it
and follow the prompts.
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=sj
-41059-1&lc=en&cc=us&dlc=en&product=446436&os=219&lang=en