Acrobat Standard XI stops working while using it

I am using Acrobat XI standard on a Windows 7 PRO SP1 machine and while using the program I keep getting the error Acrobat has stopped working, and the program closes.  I restart it and it works fine for a while, then the same thing happens again.

This is what is in the Windows event viewer reports:

Faulting application name: Acrobat.exe, version: 11.0.12.18, time stamp: 0x55913c22

Faulting module name: Acrobat.dll, version: 11.0.12.18, time stamp: 0x55913bf6

Exception code: 0xc0000005

Fault offset: 0x000bdc0c

Faulting process id: 0xbc8

Faulting application start time: 0x01d0e740467d75fd

Faulting application path: C:\Program Files (x86)\Adobe\Acrobat 11.0\Acrobat\Acrobat.exe

Faulting module path: C:\Program Files (x86)\Adobe\Acrobat 11.0\Acrobat\Acrobat.dll

Report Id: 4e1b17e2-533a-11e5-8427-c80aa9320ec9

I have been working on editing some submittal forms for work, and adding password security.  This happens about once an hour.

Anyone have any ideas on fixing this issue?

Appreciate your time and assistance.