Samsung SCX-4521F scanner failure into Acrobat 9.1.3

Question

I have the above mentioned all-in-one, latest scan drivers loaded from Samsung.  Windows XP SP3 fully up to date.  Acrobat recognizes the WIA driver (must invoke Custom Scan since does not allow presets), allows option changes, but when Scan button is pushed it fails with msg "Error while interacting with the scanner: the selected scanner was not found".  The msg doesn't make much sense, since Acrobat has already interacted with the scanner, but there it is.
I'm an experienced pc IT type, have gone thru the usual reload drivers, etc., with no luck.  All other applications can scan directly from the WIA Twain32 driver, including Adobe Photoshop CS4, but not Acrobat.  I have searched knowledge base, Googled, etc., no info.
Richard Southworth

Answer 1

Bill, I believe you need to read my other posts, Adobe Acrobat from the built-in administrator account is the only app that won't scan successfully.  And in XP there are now two ways to scan, Twain and WIA (Windows Imaging Acquisition), both fail.
So here's the final workaround, in case anybody else has this issue and needs a "fix".  I have two accounts on my Windows XP SP3 system, the built-in Administrator account (my normal working logon) and a second user account, call it X, that also has administrative privileges (belongs to the administrators group).  I have a shortcut on my desktop in the Administrator account for Acrobat - I right click on it and choose Run as from the pop-up menu.  I then select the X account and enter its password, and Acrobat appears.  Scan to pdf now works properly for both of my scanners; when finished I have to be careful where I save the pdf, since the Desktop and My Documents are for the X user and don't show up automatically since I'm logged into the system as Administrator.  Not a big deal, easy enough to put the final pdf somewhere convenient to locate.
So there you have it, Adobe for some obscure reason has inhibited scan to pdf while in the built-in Administrator account, at least in my system and for two different scanner brands (Epson and Samsung).  I don't believe it is a permissions issue; I have examined all involved files and registry entries for such and have found no obvious problems.  I have uninstalled and installed both Acrobat and the scanner driver for all combinations of the two users, again with always the same result.
Richard Southworth