Please follow these instructions exactly and then before you install the drivers, look in explorer and see if the Dell Printer folder is there. If so, then delete it, then install the drivers as described below.
Disconnect your printer. Download and run this patch (a MUST with Vista machines) to completely remove the printer from your computer.
Restart your computer.
Download the proper drivers
Install the proper drivers. You'll be prompted when to connect your printer.
Scanning using USB connection, open the Dell All-In-One Center, click on scanning and copying and scan from there.
Scanning wirelessly, use the scan buttons on the printer.
Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks
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#MicrosoftMVP - Windows Expert-Consumer April 1, 2012 to March 31, 2015