I've been running Acrobat 8 pro on a 64bit machine under Windows 2012 R2 for some time. It worked fine until a few days ago. Now it freezes after a few seconds, usually less than 30 seconds, whenever I open it with or without a file. Also trying to print to the Adobe printer just results in a document stuck in the queue. I have tried the following with no luck:
starting in safe mode
moving all the API's
repairing the install
checking for temporary files--there are none
running sfc /scannow
trying to turn off protected mode-cannot find any such switch
updating graphics drivers
So I'm open to suggestiions.
Adobe Acrobat 8 failed on my Vista 64-bit machine some years back. Adobe said it was an Acrobat 8 issue and said Acrobat 9 would fix the problem. They gave me a free copy and Version 9 worked very well.
Acrobat 8 and 9 are long dead. Adobe V11 and V2015 (DC) work very well in 64-bit machines and you probably should upgrade.