Acrobat Pro XI Installation Steps
1.) When file is downloaded, go to downloaded file and extract it with WinRAR ( you can download it for free or you can use any similar program )
2.) Open extracted folder and Then double-click on Setup.exe file
3.) This will lead you to the install, it might ask you are you sure that you want to install, your answer should be yes
4.) Enter your name as User Name and Adobe as Organization, and serial number.
5.) After installation, run the update AcrobatUpd11023.msp
6. If you get this problem ( Error 1328), Please! Click "Ignore" to continue and wait. ( That is because some files are updated and can't be re-updated )
7) Open Acrobat XI Pro from desktop and enjoy.