printer driver for windows 7 64 bit

Go to http://www.dell.com/printers
Select Drivers, Manuals and Support
Select Drivers & Downloads
Select Choose a Model
Select Printers > Printer > 962 (Photo All-in-One)
Press Confirm

Since Windows 7 isn't available, select Windows Vista 64-bit

This is the web page for your printer's driver.
Click on Windows 7 Compatibility More Details for more information.
Extract: "If you still cannot find all of the Windows 7 drivers for your unit, most of the existing Windows Vista drivers should work."