I have a epson workforce and thats the way the epson scan works. Its a royal pain where you have to tell it what to call the file and what type of file that you want and where to save it before it scans.
You may have been using another program to do the scanning before. or an older version that updated itself
If it just changed recently you might be able to get it back the way it was by doing a system restore to when it was doing what you wanted it to do.
System restore instructions - windows 7 or 8 or 10
hold the windows logo key down and hit R
type rstrui.exe in the run box that comes up and hit enter
select restore to an earlier date.
Under the "suggested restore" which is usually not old enough to help is a link for "OTHER RESTORE POINTS"
click that if the suggested ones are not BEFORE THE PROBLEM STARTED
choose a date that is BEFORE you experienced the problem
hit ok / restore
the computer will start to shut down
a restoring settngs box will appear with a status bar
when it finishes your computer will restart with the same settings it had on the date you restored to. your data will not be affected.
It is not perfect. But it fixes a lot of things.