When you start Adobe Acrobat 8 Professional or Standard, you receive the error message "A serious error has been detected and Adobe Acrobat 8 Professional [or Standard] cannot continue. Please reinstall the application and try again."
Acrobat verifies activation when you start the application. If Acrobat is not able to detect that the activation occurred, then it initiates the process. In order for the activation to complete successfully, you must have an uncorrupted version of the AdobeConfig.xml file on the system.