One of those cases where I have no clue what the error number is for. There is a post for Reader 8 with the same error that might be helpful at http://helpx.adobe.com/acrobat/kb/error-1635-patch-package-not.html. Other than that, try installing as the administrator and with antivirus disabled.
Thanks for the post. I've seen the Adobe post you reference but it references "HKEY_CLASSES_ROOT\Installer\Features\68AB67CA330100007706000000000030" which differs from the registry key in my installation (which is "68AB67CA3301004FABE7000000000050" -- only the final two numbers differ).
The error 1635 problem doesn't seem to be unique as I have found several references to it (for different Adobe products) but none of the suggested fixes work for me.
Thank you for the tip. I downloaded Adobe's Uninstaller tool, reinstalled Acrobat X and -- received the same error message (1635) -- when attempting to update the program to the latest security fix.
Surely there must be a fix for this?
The old Adobe documents for this error message is here:
Perhaps, it is worth a try to see if it works for you in Acrobat 9 and 10.
Good luck and please report back if you are successful.
Many thanks for the help.
I had seen this Adobe document before posting my issue but unfortunately it references a slightly difference registry key than in my Acrobat X Standard installation --
"Important: Verify that the correct registry key is selected. When viewing a path of HKEY_CLASSES_ROOT\Installer\Features\68AB67CA330100007706000000000030, only the 68AB67CA330100007706000000000030 key should be selected. If the name does not match exactly, do not select the item."
My registry key ends in 50 and not 30, so based on Adobe's advice above I'm reluctant to delete it.
Any other thoughts?
Assuming you have tried everything including using the uninstaller tool then it looks like you will need to take a risk by either deleting the registry key ending with 50 or try to use CCleaner which will match the product and remove the registry key for you automatically.
With CCleaner you have the option to delete only the Adobe Key rather than other redundant keys that are always there because of the way how Windows works. I use Ccleaner regularly but I consider myself quite good at PC Maintenance and Repair so it is up to you to take the risk.
Do you know anybody whose hobby is to fix PCs? Perhaps they can remove the necessary keys from the registry.