0xC004F050 and 0xC004F025: the ESU product key is rejected on install
0xC004F050 and 0xC004F025 stop the ESU key installing, from a wrong key, a missing prerequisite or no elevation. Fix entitlement so ESU patches keep arriving.
0xC004F050 in Office: the product key is invalid or for the wrong edition
Office error 0xC004F050 means the product key is invalid, mistyped or meant for another edition. See what causes it and how to fix it properly.
0xC004F050 and 0xC004C001: Windows Says This Product Key Is Invalid
0xC004F050 and 0xC004C001 mean Windows or the activation server rejected the key outright. Learn how to tell a typo from a dead key and what to do next.