С офф форума
Use the Acrobat Cleaner Tool to completely remove Adobe Reader, then try the Reader installation again. Note that the cleaner tool will also remove Acrobat if it is installed.
Используйте Acrobat Cleaner Tool для полного удаления и переустановите
http://labsdownload.adobe.com/pub/labs/acrobat_ittools/acrobat_ittools_cleaner_p1_040612.zip