(reproduced, window8.1/64bit System Pro-Test available)
1. Delete C:\Program Files\Common Files\adobe\adobe pcd\cache\cache.db and C:\Documents and Settings\All Users\Application Data\flexnet\adobe_00080000_tsf.data (C:\ProgramData\FLEXnet\adobe_00080000_tsf.data under Windows 8/windows 7/vista System) ) Two record files. It is important to note that the second file is a hidden file, so set the show hidden file first.
2. Then change the Hosts file. Join in C:\windows\system32\drivers\etc\hosts (may also be hidden file; Open with Notepad)
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
Shielded networking verification.
3. Restart Acrobat and follow the prompts to reactivate, using any one of the following serial numbers
1118-1003-2497-4698-2571-4985
1380-1116-3895-6161-9341-0470
Adobe Acrobat Pro 9 hack