An error has occurred and installation has been interrupted

Hi,
When I try to install Camtasia 8 in my computer I ended up with an error message. I tried several times but I am getting this fatal error again and again. This error message interrupted my installation and it failed. What is this fatal error means? How to fix this error? Please help me with some solutions. Thanks.

We’re sorry!
An error has occurred and installation has been interrupted.
