Oh well, I keep repeat this, so suggest that you should do some little search before post
Wamp2 does NOT upgradeable from previous wamp, so before installing wamp2, make sure you uninstall old wamp, delete its folder, clean up its registry which is wampapache and wampmysql, restart computer then reinstall wamp2
In addtion, make sure you don't have any other soft that use or block port 80 and 3306 such as iis, skype, internet optimizer, zone alarm, windows firewall, windows defender, so on
Have fun,
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