I think I am having the same issue as the OP. This machine was installed with Windows 7 years ago before I worked for the company (actually it looks like it may have been downgraded from Windows 8, but that's only because there's a little Windows 8 sticker
on it, but no product key). Suddenly the machine no longer thinks it is a genuine copy of Windows. We do NOT use any sort of volume licensing or KMS host. I downloaded the update at the link you posted. I ran that update. I rebooted, but no luck. This is the
MGADiag output (same as before except last digit of "ID" incremented by one):
Diagnostic Report (1.9.0027.0):
-----------------------------------------
Windows Validation Data-->
Validation Code: 50
Cached Online Validation Code: 0x0
Windows Product Key: *****-*****-788W3-H689G-6P6GT
Windows Product Key Hash: yr8OHoeXhbT4dc6MxGYjdAStSPY=
Windows Product ID: 00371-OEM-8992671-00008
Windows Product ID Type: 2
Windows License Type: OEM SLP
Windows OS version: 6.1.7601.2.00010100.1.0.048
ID: {0696B708-1A75-45BB-ACDC-DF1FE77347A6}(3)
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.171231-1547
TTS Error:
Validation Diagnostic:
Resolution Status: N/A
Vista WgaER Data-->
ThreatID(s): N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002
Windows XP Notifications Data-->
Cached Result: N/A, hr = 0x80070002
File Exists: No
Version: N/A, hr = 0x80070002
WgaTray.exe Signed By: N/A, hr = 0x80070002
WgaLogon.dll Signed By: N/A, hr = 0x80070002
OGA Notifications Data-->
Cached Result: N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002
OGAExec.exe Signed By: N/A, hr = 0x80070002
OGAAddin.dll Signed By: N/A, hr = 0x80070002
OGA Data-->
Office Status: 109 N/A
OGA Version: N/A, 0x80070002
Signed By: N/A, hr = 0x80070002
Office Diagnostics: 025D1FF3-364-80041010_025D1FF3-229-80041010_025D1FF3-230-1_025D1FF3-517-80040154_025D1FF3-237-80040154_025D1FF3-238-2_025D1FF3-244-80070002_025D1FF3-258-3
Browser Data-->
Proxy settings: N/A
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Win32)
Default Browser: C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
Download signed ActiveX controls: Prompt
Download unsigned ActiveX controls: Disabled
Run ActiveX controls and plug-ins: Allowed
Initialize and script ActiveX controls not marked as safe: Disabled
Allow scripting of Internet Explorer Webbrowser control: Disabled
Active scripting: Allowed
Script ActiveX controls marked as safe for scripting: Allowed
File Scan Data-->
Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{0696B708-1A75-45BB-ACDC-DF1FE77347A6}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.048</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-6P6GT</PKey><PID>00371-OEM-8992671-00008</PID><PIDType>2</PIDType><SID>S-1-5-21-4054717618-2848826224-692455488</SID><SYSTEM><Manufacturer>Hewlett-Packard</Manufacturer><Model>HP
EliteDesk 800 G1 TWR</Model></SYSTEM><BIOS><Manufacturer>Hewlett-Packard</Manufacturer><Version>L01 v02.18</Version><SMBIOSVersion major="2" minor="7"/><Date>20130909000000.000000+000</Date></BIOS><HWID>6EF53807018400F4</HWID><UserLCID>0409</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>Eastern
Standard Time(GMT-05:00)</TimeZone><iJoin>1</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>HPQOEM</OEMID><OEMTableID>SLIC-BPC</OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults>
Spsys.log Content: 0x80070002
Licensing Data-->
C:\Windows\system32\slmgr.vbs(1333, 5) (null): 0xC004F012
Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x00000000
HealthStatus: 0x0000000000000000
Event Time Stamp: 1:6:2018 08:33
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:
HWID Data-->
HWID Hash Current: MAAAAAEAAgABAAIAAAACAAAAAQABAAEA6GG+Z/jNwhsiaz6BrikGSSxAejmYxcj2
OEM Activation 1.0 Data-->
N/A
OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: yes
Windows marker version: 0x20001
OEMID and OEMTableID Consistent: yes
BIOS Information:
ACPI Table Name
OEMID Value
OEMTableID Value
APIC
HPQOEM
SLIC-BPC
FACP
HPQOEM
SLIC-BPC
HPET
HPQOEM
SLIC-BPC
MCFG
HPQOEM
SLIC-BPC
FPDT
HPQOEM
SLIC-BPC
SSDT
PmRef
Cpu0Ist
SSDT
PmRef
Cpu0Ist
SSDT
PmRef
Cpu0Ist
SSDT
PmRef
Cpu0Ist
SSDT
PmRef
Cpu0Ist
SSDT
PmRef
Cpu0Ist
SLIC
HPQOEM
SLIC-BPC
MSDM
HPQOEM
SLIC-BPC
ASF!
INTEL
HCG
TCPA
APTIO4
NAPAASF
