Uninstalling adobe pdf XI trial version
You either need the install CD or usually just go to the Control Panel>Programs & ... (WIn 7 and above) or Control Panel>Add/Remove Programs (Win XP). Select Acrobat 7 and repair it. You may be able to open Acrobat 7 (it is the related parts of the program that usually fail) and use Help>Repair. I would do all from Acrobat or the Control Panel before trying the CD (Do keep the CD in a safe place in case you need it in the future).