I am unable to configure a PHP/MySQL/Apache environment on my local machine using XAMPP.

In my xampp control panel the Apache and MySQL status is as started, but localhost is not working. I have tried the following method but still i am unable to execute:

1. I tried to reinstall after uninstalling several time. I changed the "Listen 80" to Listen localhost:80, localhost:8080, 127.0.0.1:80,127.0.0.1:8080, MySystemIP:80/8080 and tried to execute the relevant url in my browser.
2. I executed the netstat -noa and tasklist and found Apache is is using Port80.
3. Skype is also not using the port80.
4. I edited the firewall to allow port80.
5. Also disabled the firewall.

Is there any other solution to fix my problem. I remember 8 months back everything worked properly. Now when i try to reinstall xampp the issue raised it. I am Using Win-xp os.

Thanks in advance