In trying to uninstall Reader 8.1.2 in get the message that 'AdbeRdr812_en_US.msi' cannot be found. that the Installation source is not available. I cannot up date to 9 either or even in stall and old version because it thinks that the 8.1.2 is up and running. So I have nothing and can't do anything.
ok so here is what happened. I followed Carl L Lambert's advice from Forum Topic "AcroRead.msi?" Using the "WINDOWS INSTALLER CLEANUP UTILITY" followed the insturctions he gave, It removed my old reader 8.1.2and then I was able to install 9. Thanks Carl!