Originally I got this error message: "Error 1321. The installer has insufficient privileges to modify the file C:\Program Files (x86)\Adobe\Reader 11.0\Reader\Browser\nppdf32.dll" A user give me this response: hi jhohn1190, this problem won't be related to javascript which is enabled in firefox by default - this would only apply if you're not able to download the setup file at all. since the error message is referencing missing privileges, please try right-clicking and running the setup as administrator. in case this doesn't help, please contact adobe's support in order to get their product working. I did what he said and now I get this error message: "Error 1310. Error writing to file:\Program Files (x86)\Adobe\Reader 11.0\AcroTextExtractor.exe. Verify that you have access to that directory.” Note that At least this time the sub directories "Adobe\Reader 11.0" exist, but below them is another - empty - directory "Reader", and nothing else. I'd appreciate more help, and thanks ...