Acrobat.dll error when using Adobe Acrobat 7.0 Professional

What Windows environment are you in? Have you tired re-creating the Acrobat preferences. This snipet is taken from the troubleshooting guide:

Note: Custom settings for Collaboration, JavaScripts, Organizer, Security, Stamps, Color Management, Auto Fill, Web Capture and Updater will be affected by using this solution.

To re-create the Acrobat Preferences folder:
1. Quit Acrobat.
2. In Windows Explorer, go to Documents and Settings\ [username] \Application Data Adobe\Acrobat\7.0 folder and move the Preferences folder to another location (for example, C:\Temp).
3. Start Acrobat. Acrobat creates a new Preferences folder.

http://kb.adobe.com/selfservice/viewContent.do?externalId=331045&sliceId=1

OP = Windows XP Pro.
I tried your suggestion but as soon as I launched 7.0, the error message appeared.
Iwill be trying the suggested link you sent me.
Thanks.

Unfortunately, none of the solutions in the link you sent me helped.
The error message still pops up as soons as I launch acrobat 7.0.
Thanks.

From the first line of the error message, it appears your user is trying to do something involving a digital signature. You should be aware that Adobe has added different signature methods with the release of major versions of Acrobat. I would look at the application that created the form and the signature method trying to be applied or used and see if version 7 can handle this method. Signatures also involve plug ins, so I would also check that the signature method's plug in is present in the user's application plug in folder.

Thanks for the suggestion.
Something interesting i found out:

When I logged in as the Admin to the LT, I was able to run Adobe Acrobat 7.0 and convert a Word doc successfully. I added the user to the Administrator's group but when she logged back in as herself, she got the error message.

As it turned out, there was some corruption in her user profile because I added myself to the LT with the same rights as she had and AA 7.0 worked fine.
I deleted her profile and removed her etirely from the LT, readded her back in with her original rights and it is all working fine now. Just very strange, but thanks for all suggestions.