I've had the same problem on my WIn 7 x64 but manage to get it working:
1 Give "start wampserer" an exception in win firewall.
2 Rightclick on "start wampserver" go to properties and under Security give you're user full premissions
3 start wampserver
4 leftclick on the icon located under the "up arrow" left side of the clock in the startmeny bar.
5 i
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