The usual reason for this is simply that php runs out of execution time.
Check your php.ini file ( use the wampmanager menus so you edit the correct version of this )
Check your php.ini file ( use the wampmanager menus so you edit the correct version of this )
left click wampmanager -> PHP -> php.ini
This will open notepad on the correct php.ini file, look for this directive
max_execution_time = 60
Change it to something larger like
max_execution_time = 240
Then retry your install.
Remember to set it back to 60 after the install completes
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