KMS and BIOS invalid Windows Marker

Hi, i have couple of computers (5) are not able to connect with KMS server. I ping and telnet KMS server fine. when i ran slmgr /ato I am getting "0xC004F035 The software Licensing Service reported that the computer could not be activated with a Volume license product key. Volume licensed systems require upgrading from a qualified operating system. Please contact your system administrator or use a different type of key"

So i ran MGADiag tool and here is the result.

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Diagnostic Report (1.9.0027.0): ----------------------------------------- Windows Validation Data-->

Validation Code: 0 Cached Online Validation Code: N/A, hr = 0xc004f012 Windows Product Key: *****-*****-2VJC9-XBBR8-HVTHH Windows Product Key Hash: k/l/EMDQdwK9OvdCkPtHG1YdosE= Windows Product ID: 00392-918-5000002-85488 Windows Product ID Type: 1 Windows License Type: KMS Client Windows OS version: 6.1.7601.2.00010100.1.0.004 ID: {AC931509-2A34-400C-AA11-B022DCAE6BD1}(1) Is Admin: Yes TestCab: 0x0 LegitcheckControl ActiveX: N/A, hr = 0x80070002 Signed By: N/A, hr = 0x80070002 Product Name: Windows 7 Enterprise Architecture: 0x00000009 Build lab: 7601.win7sp1_gdr.140303-2144 TTS Error: Validation Diagnostic: Resolution Status: N/A

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

File Scan Data-->

Other data--> Office Details: {AC931509-2A34-400C-AA11-B022DCAE6BD1} 1.9.0027.0 6.1.7601.2.00010100.1.0.004 x64 *****-*****-*****-*****-HVTHH 00392-918-5000002-85488 1 S-1-5-21-1241983026-2597400401-1969949576 Dell Inc. OptiPlex 7010 Dell Inc. A19 20140818000000.000000+000 45033507018400FE 0409 0409 China Standard Time(GMT+08:00) 1 3 DELL  CBX3   100 100 Microsoft Office Professional Plus 2007 12 B61018E31FA6586 Ysdx7w+WZrdQ8N0OmWRRc10o2J4= 89409-707-0103881-65758 14  

Spsys.log Content: 0x80070002

Licensing Data--> Software licensing service version: 6.1.7601.17514

Name: Windows(R) 7, Enterprise edition Description: Windows Operating System - Windows(R) 7, VOLUME_KMSCLIENT channel Activation ID: ae2ee509-1b34-41c0-acb7-6d4650168915 Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f Extended PID: 00392-00170-918-500000-03-1033-7601.0000-2612014 Installation ID: 012271809634070904467655469500268060441214179430876963 Partial Product Key: HVTHH License Status: Initial grace period Time remaining: 41880 minute(s) (29 day(s)) Remaining Windows rearm count: 0 Trusted time: 1/23/2015 12:28:39 AM Please use slmgr.vbs /ato to activate and update KMS client information in order to update values.

Windows Activation Technologies--> HrOffline: 0x00000000 HrOnline: N/A HealthStatus: 0x0000000000000000 Event Time Stamp: N/A ActiveX: Registered, Version: 7.1.7600.16395 Admin Service: Registered, Version: 7.1.7600.16395 HealthStatus Bitmask Output:

HWID Data--> HWID Hash Current: KgAAAAEAAQABAAEAAAABAAAAAQABAAEAln1uwVafcvu2CbrGFsY49pZj

OEM Activation 1.0 Data--> N/A

OEM Activation 2.0 Data--> BIOS valid for OA 2.0: no, invalid SLIC table Windows marker version: N/A OEMID and OEMTableID Consistent: N/A BIOS Information:   ACPI Table Name OEMID Value OEMTableID Value   APIC   DELL    CBX3     FACP   DELL    CBX3     HPET   DELL    CBX3     MCFG   DELL    CBX3     FPDT   DELL    CBX3     SSDT   SataRe  SataTabl   SSDT   SataRe  SataTabl   SSDT   SataRe  SataTabl   DMAR   INTEL   SNB   ASF!   INTEL    HCG   SLIC   DELL    CBX3  

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Seems like Bios invalid Windows Marker

any suggestion???????????????