I downloaded Adobe Air, but I can't install it due to "Adobe Air is damaged, please obtain it from the web" error. I tried to re-download it many times, but it didn't work. Can you help?
Download it from Adobe's website... If this doesn't help clean your registry with a good registry cleaning utility... This will surely solve your problems...
Delete the installation package and run CCleaner or Argente - Registry Cleaner to make sure that there are no leftover rogue registry keys in your system. After that, navigate to Adobe Downloads page and click the yellow Download now button. Save the installer on your computer, right-click on the file, select Run as Administrator and install the program following the self-explained steps. If you still have issues, you can get in touch with an Adobe technician using the contact information from the official web page. Also, check the Troubleshoot AIR installation page.