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Windows COA Validation Failure

Question
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Hi, I hope someone can help with this. After a failed (and unwanted) automatic Windows 8 upgrade, I now see the activation message in the bottom right of my screen and validation fails.
The Diagnostic message is as below:
Diagnostic Report (1.9.0027.0):
-----------------------------------------
Windows Validation Data-->
Validation Code: 50
Cached Online Validation Code: 0xc004c4a8
Windows Product Key: *****-*****-B3GRD-8JFY3-426YX
Windows Product Key Hash: fHvIDbDbB98sLmpLUoz8vLma5Fw=
Windows Product ID: 00371-OEM-9305227-91026
Windows Product ID Type: 8
Windows License Type: COA SLP
Windows OS version: 6.1.7601.2.00010100.1.0.048
ID: {04B4D3A3-DB2B-4357-9556-922E88733B90}(1)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Professional
Architecture: 0x00000009
Build lab: 7601.win7sp1_ldr.160317-0600
TTS Error: T:20161004203823084-
Validation Diagnostic:
Resolution Status: N/A
Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0xC004C4A8
HealthStatus: 0x0000000000000000
Event Time Stamp: 4:5:2017 17:13
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:Wednesday, April 12, 2017 5:34 AM
Answers
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There is a Trusted Store Tamper showing - which is probably the cause of the problem (although the entire MGADiag report is required for a proper diagnosis.
Often this is caused by corruption of files -
Please run a full CHKDSK and SFC scan....
Click on Start > All Programs > Accessories
Right-click on the Command Prompt entry
Select Run as Administrator and accept the UAC prompt - the Elevated Command Prompt window should pop up.
At the Command prompt, type
CHKDSK C: /R
and hit the Enter key.
You will be told that the drive is locked, and the CHKDSK will run at the next boot - hit the Y key, and then reboot.
The CHKDSK will take a few hours depending on the size of the drive, so be patient!
After the CHKDSK has run, Windows should boot normally (possibly after a second auto-reboot) - then run the SFC.
SFC -System File Checker - Instructions
Click on Start > All Programs > Accessories
Right-click on the Command Prompt entry
Select Run as Administrator and accept the UAC prompt - the Elevated Command Prompt window should pop up.
At the Command prompt, type
SFC /SCANNOW
and hit the Enter key
Wait for the scan to finish - make a note of any error messages - and then reboot.
Upload the CBS.log file (compressed, please!) to your OneDrive or DropBox Public folder, and post a link - also post a new MGADiag report.
Noel Paton | Nil Carborundum Illegitemi CrashFixPC | The Three-toed Sloth No - I do not work for Microsoft, or any of its contractors. - Proposed as answer by Noel D PatonModerator Tuesday, April 18, 2017 4:48 PM
- Marked as answer by Noel D PatonModerator Wednesday, May 17, 2017 2:44 PM
Wednesday, April 12, 2017 11:26 AMModerator
All replies
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Please post the entire MGA report. You have edited out vital information. Thank you!
Carey Frisch
Wednesday, April 12, 2017 6:12 AMModerator -
There is a Trusted Store Tamper showing - which is probably the cause of the problem (although the entire MGADiag report is required for a proper diagnosis.
Often this is caused by corruption of files -
Please run a full CHKDSK and SFC scan....
Click on Start > All Programs > Accessories
Right-click on the Command Prompt entry
Select Run as Administrator and accept the UAC prompt - the Elevated Command Prompt window should pop up.
At the Command prompt, type
CHKDSK C: /R
and hit the Enter key.
You will be told that the drive is locked, and the CHKDSK will run at the next boot - hit the Y key, and then reboot.
The CHKDSK will take a few hours depending on the size of the drive, so be patient!
After the CHKDSK has run, Windows should boot normally (possibly after a second auto-reboot) - then run the SFC.
SFC -System File Checker - Instructions
Click on Start > All Programs > Accessories
Right-click on the Command Prompt entry
Select Run as Administrator and accept the UAC prompt - the Elevated Command Prompt window should pop up.
At the Command prompt, type
SFC /SCANNOW
and hit the Enter key
Wait for the scan to finish - make a note of any error messages - and then reboot.
Upload the CBS.log file (compressed, please!) to your OneDrive or DropBox Public folder, and post a link - also post a new MGADiag report.
Noel Paton | Nil Carborundum Illegitemi CrashFixPC | The Three-toed Sloth No - I do not work for Microsoft, or any of its contractors. - Proposed as answer by Noel D PatonModerator Tuesday, April 18, 2017 4:48 PM
- Marked as answer by Noel D PatonModerator Wednesday, May 17, 2017 2:44 PM
Wednesday, April 12, 2017 11:26 AMModerator