Hi,
· Which operating system is installed on your computer?
· Have you made any changes on the computer prior to the issue?
Issue 1: Acrobat failed to send DDE command
Try launching acrobat in safe mode, to do so follow the steps:
a. Press and hold down shift and double click the acrobat icon and then open a pdf file.
b. If it opens without crashing after about 15 seconds, then you have a faulty plug in, locate and remove it from your plug-ins folder.
c. To remove plug-ins, you may contact Acrobat Support
Issue 2: Adobe air not successful download latest
You may try uninstalling and re-installing the program.
Let us know if this information helps.