help please! i installed CS5 premium from an original adobe dvd with an unused serial number. The serial number is not working. did the online chat and they were not helpful. can someone re-activate my serial number? please. Thanks.

When you ask a question you need to provide some basic information

Mac or Windows, and EXACTLY which version of the operating system?

Recent Mac AND Windows operating systems have been known to cause "odd" problems

Are you using a computer Administrator account with full read/write permission?

Are you entering a serial number, or a redemption code?

Redemption Code http://helpx.adobe.com/x-productkb/global/redemption-code-help.html

-and https://forums.adobe.com/thread/1572504

Invalid License http://helpx.adobe.com/creative-suite/kb/error-serial-number-valid-product.html

-http://helpx.adobe.com/creative-suite/kb/invalid-serial-number-cs4.html

-and http://forums.adobe.com/thread/1038761

Also, this is an open forum, not Adobe support... no other user here can give direct help with a serial number problem