In simpler terms: Office tried to install your product key into Windows' secure vault, but Windows refused to accept it because the existing data is damaged, incorrect, or blocked by system policies.
Clearing the store's temporary database forces Windows to rebuild its licensing definitions. Press to open the Run dialog box. Type wsreset.exe and press Enter . A blank Command Prompt window will appear. Do not close it. In simpler terms: Office tried to install your
Your device's time/date settings are incorrect, preventing a secure connection to Microsoft servers. Type wsreset
This error is most frequently observed by IT administrators managing environments via Microsoft Intune or Microsoft Entra ID. It appears when a system attempts an automatic to upgrade a device from Windows Pro to Windows Enterprise. What Causes Error 0xC03F6601? Your device's time/date settings are incorrect, preventing a
| Check | Action | | :--- | :--- | | | Run slmgr /dli – Does it match your key? | | License Type | Are you mixing Retail, OEM, or Volume? | | KMS Stale Data | Run slmgr /upk then /ckms | | Corrupt Store | Rename %windir%\system32\spp\store\2.0 | | RDS Specific | Check CAL version and licensing mode |
Most users can resolve this error by working through the following steps. All commands require an account.