So this is the message I receive when attempting to install Adobe Reader 9 or remove Adobe Reader 8 - I have attempted and completed ALL steps from KB405220 to no avail. I am pretty sure that the error is reporting due to corruption in the registries as even installing to a new location will produce the same error. I contacted Adobe support who were unable to help me because pointing me to the correct registries would technically be "supporting microsoft windows" as opposed to their own product.
If anyone else has had a similar issue could you please provide me with some assistance?
As mentioned I tried everything available listed in the KB405220 that was available; that solution being a recommended solution as well I had also tried it to no avail. The windows installer cleanup tool does not succesfully remove the stale entries for Adobe Reader 8 (which I am unable to remove currently, in order to install 9).
On a side note:
Attempting to re-run the installation package for Adobe Reader 8 fails before prompting me to Modify, Repair, Remove so I am also unable to try repairing the installation prior to removal.