Apache server not working (no replies)

Hello everyone.

I am having some trouble with wampserver.
I was using it normally, but now the icon won't turn green anymore.

It seems that apache server is not running. I tryied changing the port to 8080 and other common solutions, but nothing worked.

When I test port 80, or other ports that apache is using, the following message comes:

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***** Test which uses port 80 *****

===== Tested by command netstat filtered on port 80 =====

Test for TCP
Port 80 is not found associated with TCP protocol
Port 80 is not found associated with TCP protocol

===== Tested by attempting to open a socket on port 80 =====

Your port 80 seems not actually used.
Unable to initiate a socket connection
Error number: 10061 - Error string: No connection could be made because the target machine actively refused it.
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I am not sure if this is a problem.

I am running the 64bit version on Windows 7 64bits.
All the C++ packages are installed properly.

So, I would appreciate if somebody could help me.

Thanks.