Try this: You will only want to delete the files associated with your obsolete scanner.
If you are not sure, please contact tech support of the uninstalled scanner.
Following the un-installation of the programs, delete the "twain"
files and the "twunk" files. This is done because some of these files are
not removed from the computer when the programs are uninstalled.
a. Go to "Start," come up to "Find or Search," and
click on "Files or Folders." Be sure the "look in" box is set to search the
hard drive, or "C:" drive.
b. In the "named" box type "twain" (minus the quotes).
Make sure the box to the left of "Include subfolders" is selected (has a
check mark in it). If not, click on the box.
c. Click on the "Find Now" button.
d. Delete all of the "twain" files by going to "Edit"
and clicking on "Select all," and then going to "File" and clicking on
e. Go through the previous four steps again, but this
time type "twunk" (minus the quotes) in the "Named" box instead of typing
The only "twain" and "twunk" files that I found were located in the windows.old directory. Were your instructions for a version of Windows prior to Windows 7? I suspect you're on the right track but that Windows 7 is enough different that I need different instructions.
Thank you for your prompt help so far.