I was having the exact same problem and decided to 'Test Port 80' from the Apache Service menu - it reported an error and suggested that Skype may be causing it.
I exited from Skype, 'Stop All Services' and then 'Start all Services' = green WAMP icon and active/working localhost.
I didn't do anything where 'vcredist_x64.exe' or 'apache vc6' is concerned.
The problem (on my machine at lea
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