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Volume Activation 2.0 Operations Guide
Microsoft Corporation Page 34
Error Code Error Message Activatio
n Type
Possible
Cause
Troubleshooting Steps
computer could not be
activated. The Key
Management Service (KMS) is
not enabled.
KMS request is
not answered.
(default) is not blocked by a firewall or otherwise
filtered.
0xC004F041
The software Licensing
Service determined that the
Key Management Server
(KMS) is not activated. KMS
needs to be activated.
KMS client KMS host is not
activated.
Activate the KMS host with either online or phone
activation.
0xC004F042
The software Licensing
Service determined that the
specified Key Management
Service (KMS) cannot be
used.
KMS client Mismatch
between KMS
client and KMS
host.
Check that a Beta client is not activating against a
Released KMS host, or a Released client against a
Beta KMS host.
0xC004F050 The Software Licensing
Service reported that the
product key is invalid.
KMS, KMS
client, MAK
This can be
caused by a
typo in the KMS
key, or by
typing in a Beta
Key on a
Released
version of the
OS.
Install the appropriate KMS key on the
corresponding version of Windows. Check the
spelling. If the key is being copied and pasted,
make sure that em-dashes have not been
substituted for the dashes in the key.
0xC004F051
The software Licensing
Service reported that the
product key is blocked.
MAK/KMS The product key
on the
activation
server is
blocked by
Microsoft.
Obtain a new MAK/KMS key, install it on the
system, and activate.
0xC004F064
The software Licensing
Service reported that the
non-Genuine grace period
expired.
MAK Windows
Genuine
Advantage has
determined the
system is not
Genuine.
Follow the Non-Genuine RFM recovery guidelines in
the Volume Activation 2.0 Operations Guide.
0xC004F065
The software Licensing
Service reported that the
application is running within
MAK/KMS
client
Windows
Genuine
Advantage has
Obtain and install a Genuine product key and
activate the system during the grace period. If not,
the system will go into Non-Genuine RFM mode at