I found a link to a site I have never used before, so use at your own risk. Opendrivers.com that claims to have the driver for download. The
download link you want is halfway down the page, and requires that you
enter a verification code first.
Click here to go to that page.
Otherwise, You have two options that I know are safe. One, you may go to
umax.com, select customer service, and request the driver software from them if it isn't available for immediate download..
Or you can go to one of the safest driver download sites I know of to
search for it. Go to
driverguide.com, create a free account,
and search for umax astra 5600. A list of drivers will pop up: scroll through until you find the one you want. Good luck!