photoshop CS5我已经下载下来了但是每次打开都要重新填写序列号！

安装时选择“试用” 装完后先修改HOST文件， 用记事本编辑"C:\windows\system32\drivers\etc\"目录下的 hosts 文件, 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
127.0.0.1 activate-sjc0.adobe.com

然后再输入下面的KEY即可！
1325-1558-5864-4422-1094-1126
1325-1958-5864-4422-1094-1178
1330-1927-7762-6383-0202-0414