Error while loading the plug-in 'DigSig.api'

[Katrina Tewksbury]

This is XP Home. After installing Acrobat 5.1 - when attempting to open Acrobat it comes up with 5 errors:
"There was an error while loading the plug-in 'DigSig.api'. The plug-in is incompatible with this version of the viewer." The other 4 errors indicate 'Annots.api' 'IA32.api' 'PPKLite.api' and 'WebPDF.api'.
Any suggestions on what to try?

[Aandi Inston]

This problem is caused by installing two copies of Acrobat Reader,
from different versions, to the same folder, which you should never
do.

Finding the duplicates, and discovering which one is
the correct one to keep, can be difficult and could leave Acrobat
Reader confused or damaged. Best to start again. To do this follow
ALL of these steps. On no account skip step

4, or it will not solve anything.

1. Be sure you are ready to reinstall Acrobat Reader. Download the
installer if you deleted it last time. (It is usually best not to
delete installers, as you may need them again). Start it to make sure
you get to a prompt, then cancel without installing.

2. Find out the name of the folder where Acrobat Reader is installed;
make a note of it, you will need it in step 4 and won't be able to
find out if you didn't do this before step 3!

3. Uninstall Acrobat Reader in the usual way, using the Add/Remove
Programs Control Panel. (Never use third party "uninstall" programs.)

4. Remove the folder where Acrobat Reader was originally installed, to
clear up the duplicates left behind. Uninstalling does not do this.

5. Reinstall Acrobat Reader.

Aandi Inston

[Katrina Tewksbury]

That worked! Thanks for your quick response, Aandi.