Pedro
This is definatly related to nod32, i managed to install it by stopping nod completely, to do this you need to disable the nod32 kernel service by setting it to disabled in services.msc, then reboot. After this you can install wamp5 1.7.1 and when done reenable the service and start it.
Although its not the preferred way ofcourse it will allow you to install it.
I have done it this way o
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