Scanning problems When I scan a picture it comes out pixeled.  I don't know why.  I had to download the drivers from the website because my computer got a virus and had to be whipped. Thanks, Liz

The following came from HP's site. I have also included a direct link for troubleshooting to your model if the following does not help at the very end of this post.
Hope this helps!! :)
Scanned image quality is poor

• A dirty scanner glass (fingerprints or smudges) will slow down performance and will affect scan quality because the unit is scanning the smudges on the glass. Turn off the unit and clean the glass with a soft cloth or sponge slightly moistened with a non-abrasive glass cleaner.
• Reinitialize the scanner by shutting down the HP all-in-one and then unplugging the power cord. Make sure that all originals are removed and that the scanner glass is clean. When the power is reconnected and the HP all-in-one is turned on, the scanner will recalibrate.
• The video driver and video settings on the computer may slightly change the image appearance. The HP all-in-one scans in 24-bit color. Setting the video display settings to less than 24 bit or 24 million colors will result in a loss of color information when displayed on the computer monitor. The video driver itself may change the appearance of colors when viewed on the monitor.
• Changing the image size will affect how the scan appears. Resizing the scan may make the image fuzzy. Resize the image in the destination or make the original smaller.
• When scanning an image, save it to a different file format. For instance, save it as a JPEG or TIFF file. When saving a scan as a JPEG, there is often an adjustable quality or compression setting. If the scan is to be used in Windows (such as in a screen saver or for wallpaper), the scan must be saved as a Windows bitmap (.BMP).
• The destination can represent colors differently than they appear in the original. If the destination is the image editor, modify the colors in the image editor.
• Make a copy with the same quality settings. If the copy looks better than the scan, the imaging software may be affecting the scan quality. For example, Adobe PhotoDeluxe supports printing at 300 x 300 dpi only, even though the all-in-one product is capable of 600 x 600 dpi. Some versions of Adobe Acrobat change images to either 75 or 150 dpi, depending on the version.
• Some image editors also convert the file into their own format or use a different default format resulting in loss of quality during the conversion process.