You need to "reset" your activations. Log into your u-he user account, deactivate all previous machines, and then re-verify the serial on your new system.
While Diva does not require a physical iLok dongle, it does generate a unique machine ID based on your CPU, motherboard, and OS drive. If you have recently swapped a hard drive, updated your BIOS, or reinstalled Windows, the machine ID changes. Your old "verified" serial will not work. u he diva serial number verified
Enter the used during your purchase or registration. You need to "reset" your activations
: If you purchased Diva from a third party (e.g., Native Instruments, Sweetwater, KVR Marketplace), you received a registration code deactivate all previous machines