HP Printer HP 3940 - disk worked well with Windows XP, cannot get it hooked up to new laptop running Vista. Disk won't work and neither does plug and play. Printer apparently installed, but nothing happens. Can't uninstall either and start again, and default printer is XPS (which doesn't exist). Can't change the default printer to the HP 3940 (which is less than a year old!). Would be grateful for detailed help and idiot's guide!!

Try this :-
Installing the printer driver in Windows Vista
Verify that the printer is turned on.
Connect the Universal Serial Bus (USB) cable to the printer and to the computer.
A Your devices are ready to use window might display on the screen. If the window displays and does not close automatically, close the window.
Print a test page to verify that the printer is working correctly.
Using the basic printer functions
Printing: - Open the document to be printed in the software application in which it was created.
Click File and then click Print.
Scanning: - Scanning with Windows Photo Gallery
Click the Start () icon.
Click All Programs.
Click Windows Photo Gallery.
Click File and then click Import from Scanner or Camera.
Click Import.
Click Scan.
Scanning with Windows Fax and Scanning
(NOTE: This feature works only with Windows Vista Ultimate, Windows Vista Business, and Windows Vista Enterprise)
Click the Start () icon.
Click All Programs.
Click Windows Fax and Scanning.
Click New Scan.
Click File and then click Scan.
Scanning with Paint
Click the Start () icon.
Click All Programs.
Click Accessories.
Click Paint.
Click File and then click From Scanner or Camera.
Click Scan.
Importing and viewing images on a memory card
Remove the memory card and then re-insert the memory card into the appropriate memory card slot on the printer.
(NOTE: See the User Guide that came with the printer for more information on how to insert the memory card in the printer)
On the Auto play screen that displays, click Import Pictures, View Pictures, or Open folder to view files.
Follow the instructions that display on the screen.
Using the advanced printer functions
(You might find that some of the advanced features are no longer available when using this basic driver. You can upgrade to an HP product that is fully compatible with Windows Vista if the advanced features are necessary.
To help you decide what product to upgrade to, click here for information on upgrading the product go to this link or copy and paste it into Browser :-
http://h30216.www3.hp.com/ASA/Controller?adi_hasScript=1&_AD_195R22=110&adi_scriptSID=DF57657645AF158516628FE76C76392C&sysid=84&appid=10251&_ad_stoken=sup&jumpid=re_r10602_advisors/adi/sd