First, whenever you encounter a 500 error, the first thing we recommend is to check the error logs for more information. See:
We do not test or develop AtoM on Windows, so there is a limited amount of support we can offer. However, please make sure you review the Requirements
instructions and make sure you have all the correct versions of the dependencies installed in your WAMP environment.
Let us know what you find in the webserver logs - depending on the message, we will hopefully be able to offer you further suggestions on what you can try next!