Vista - Problem Reports and solutions has stopped working

I have been using Vista basic on a dell vostro 1500 computer i bought
7 months ago.

Recently Problem Reports and Solutions stops responding for no
apparent reason. The box comes up saying that it has stopped
responding and the only option it gives is to end the program.

This usually occurs upon start-up and throughout use. At times it
will happen every 10 minutes or so and other times it won't happen for
hours.

Any ideas on what might be causing this or how I can fix it?

Thanks