We have been investigating an issue where some retail Steam codes are coming up as invalid, and we are finding that a lot of keys that are coming up as invalid are actually valid keys, which work just fine when activated from a second computer. This implies that the issue may be with the cached data on users’ Steam applications.
There are a few things that you can try, which should resolve the issue:
- First, restart your PC.
- Try opening Steam, logging into your profile, and entering the key again. We have gotten several reports that a simple second try after a restart.
- If you continue to have issues, Exit Steam.
- Navigate to the following directory: C:\Program Files(x86)\Steam and try to find ClientRegistry.blob
- Please Note: Make sure you manually exit Steam before altering this file. Altering it while Steam is running can cause stability issues
This seems to work for most codes which are coming up as invalid. If you continue to have issues, please submit a ticket to 2K Support.