Here’s a feature article written on the topic:
Bottom line: This is almost always a file permission or antivirus issue. Run as admin, whitelist the folder, or delete the license cache. You’ll be back to color grading in no time. davinci resolve keeps asking for activation key verified
Activation Overload: A single Studio license allows for two concurrent activations. If you activate a third machine, the software automatically deactivates the previous two. If this "rollover" happens too frequently in a short period, the license may reach a weekly limit, causing persistent prompts or temporary lockouts. Here’s a feature article written on the topic:
Help > Create Diagnostics Log on Desktop).There is nothing more frustrating in a video editing workflow than sitting down to cut a timeline, launching DaVinci Resolve, and being greeted by a pop-up window demanding an Activation Key. Your activation key (without sharing it publicly)
If Resolve doesn’t have write permission to its own preference folder (e.g., %APPDATA%\Blackmagic Design\DaVinci Resolve\ on Windows), it can’t save the activation state. When relaunched, it has no memory of prior verification.