開啟C:\windows\system32\drivers\etc\"找到 hosts 檔案, 右鍵點選--開啟方式---記事本，然後在末尾加上: 127.0.0.1 activate.adobe.com 127.0.0.1 practivate.adobe.com 127.0.0.1 ereg.adobe.com 127.0.0.1 activate.wip3.adobe.com 127.0.0.1 wip3.adobe.com 127.0.0.1 3dns-3.adobe.com 127.0.0.1 3dns-2.adobe.com 127.0.0.1 adobe-dns.adobe.com 127.0.0.1 adobe-dns-2.adobe.com 127.0.0.1 adobe-dns-3.adobe.com 127.0.0.1 ereg.wip3.adobe.com 127.0.0.1 activate-sea.adobe.com 127.0.0.1 wwis-dubc1-vip60.adobe.com 儲存, 再開啟CS4, 提示輸入註冊碼，1330-1930-8509-4994-7790-83791330-1523-8961-3341-6172-6670輸入以後，關閉PS就可以了