Set the computer clock back to January 1, 2006.
When you try to start a CS5 or CS4 application, you receive one of the following errors:
These errors can occur after the application has been running successfully for some time, or when you start it for the first time.
If licensing has expired for a CS5 application, the application prompts you to enter a new serial number. When prompted for the serial number, enter the number from your purchased product.
Set the computer clock back to January 1, 2006.
There are three situations that can cause this error:
The error "The license for this product has expired" is unrelated to the error "Licensing for this product has stopped working." An expired license means that a serial number, which is no longer valid, is still stored in the pcd.db database file. The valid serial number you received with your purchased product didn't overwrite the expired serial number during the installation process. Removing the expired serial number allows you to enter your valid serial number.
The error "Licensing for this product has stopped working" is related to the activation component of Creative Suite 4 software. It is related to a problem with the FlexNet Service. (Creative Suite 5 software uses a different activation component.) See these documents for solutions on how to resolve this particular error:
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