The problem has been resolved. The technician I spoke with told me to reinstall my OS because my directory was corrupt. However, all I really needed to do was go into the Windows registry and delete the keys pointing to the old copy of Acrobat 7.0.
You might advise your technicians to suggest a manual search for offending older Acrobat keys in the registry before taking the drastic step of reformatting the computer. It might save another Adobe customer with a similar problem many (additional) hours of work and worry.