Error Message in WINUAE

I have been fooling around with WINUAE for the last few days. I can get about 10% of the games to work.
In some games the AMIGA loading screen is as far as it goes. Then it stops.
In other games I get this message Software Failure Press Left Mouse Button to Continue Error: 8080 0805 Task 00011720
I press the left mouse button and it crashes.
Any help would be appreciated

Try FS UAE its a fork of winuae.

You can also try UAE4All its other emulator.