I receive “stop working” error messages

Hello,
Sometimes when I close my security software window after completing a scan I receive “stop working” error messages. My security software seems to scan correctly and error messages do not arise during the actual scans.
When I updating Ad-adware I receive the same type of messages.
I click the Update button to confirm that the Auto Update has occurred and towards the end of the update session I receive an error. This has happened the last two times I updated Ad-adware.
These errors do not occur each time I use my software, only occasionally. Does anyone know why I am getting these errors?
How I can fix these errors and stop them from happening?
Thank you for your help, it’s much appreciated.
