i controlled the same situation, IIS uses the same port 80 or the old old server (it did not delete correctly). if you cannot do it. you must change the wamp port in httpd.conf
1. Find the following lines:
Listen 80 ServerName localhost:80
2.change to
Listen 81 ServerName localhost:81
3. reserve all services.
4.Paste this address in your browser. localhost: 81
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