Windows 7 not genuine problem

Hello,

I have 2 computers with same problem. Computer is Dell 3020 SSF and it came with windows 7 pro english downgraded from windows 8. There was no language select on 1st start-up and i needed to re-install windows 7 with finnish language. After 1 month these 2 computers gives me activation error, or not genuine thingy. I ran the diagnostic on one of these machines and i hope it tells something for you. These computers dont have any serial stickers on them, so they are OEM type and the media i used to install finnish language windows 7, was OEM also. The only reason that i came up with would be that i need to use dell's installation media ?

Code:

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: {A8323B3A-325C-4DE9-87DB-FB51D9F55274}(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_gdr.140303-2144
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)\Mozilla Firefox\firefox.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>{A8323B3A-325C-4DE9-87DB-FB51D9F55274}</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-1-5-21-3201449168-2198693659-3754452433</SID><SYSTEM><Manufacturer>Dell Inc.</Manufacturer><Model>OptiPlex 3020</Model></SYSTEM><BIOS><Manufacturer>Dell Inc.</Manufacturer><Version>A02</Version><SMBIOSVersion major="2" minor="7"/><Date>20140107000000.000000+000</Date></BIOS><HWID>9C8A3E07018400F4</HWID><UserLCID>040B</UserLCID><SystemLCID>040B</SystemLCID><TimeZone>Suomen normaaliaika(GMT+02:00)</TimeZone><iJoin>1</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>DELL  </OEMID><OEMTableID>CBX3   </OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults>  

Spsys.log Content: 0x80070002

Licensing Data-->
Ohjelmistojen käyttöoikeuspalvelun versio: 6.1.7601.17514

Nimi: Windows(R) 7, Professional edition
Kuvaus: Windows Operating System - Windows(R) 7, OEM_SLP channel
Aktivointitunnus: 50e329f7-a5fa-46b2-85fd-f224e5da7764
Sovelluksen tunnus: 55c92734-d682-4d71-983e-d6ec3f16059f
Laajennettu PID: 00371-00178-926-700008-02-1035-7601.0000-1362014
Asennuksen tunnus: 006236268071083775229862752790394110301303597666443450
Suoritinvarmenteen URL: http://go.microsoft.com/fwlink/?LinkID=88338
Konevarmenteen URL: http://go.microsoft.com/fwlink/?LinkID=88339
Käyttöoikeuden URL:     http://go.microsoft.com/fwlink/?LinkID=88341
Tuotevarmenteen URL: http://go.microsoft.com/fwlink/?LinkID=88340
Osittainen tuotetunnus: 6P6GT
Käyttöoikeustila: ilmoitus
Ilmoituksen syy: 0xC004F063.
Jäljellä olevat Windowsin käyttöoikeuden tilan palautuskerrat: 4
Luotettu aika: 16.5.2014 10:41:17

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0xC004C533
HealthStatus: 0x0000000000000000
Event Time Stamp: 5:15:2014 15:13
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: LAAAAAEAAgABAAEAAAABAAAAAQABAAEA6GHIRbTYwhvKhPhmZqZmN2QOyPY=

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            DELL          CBX3   
  FACP            DELL          CBX3   
  HPET            DELL          CBX3   
  MCFG            DELL          CBX3   
  FPDT            DELL          CBX3   
  SLIC            DELL          CBX3   
  LPIT            DELL          CBX3   
  SSDT            PmRef        Cpu0Ist
  SSDT            PmRef        Cpu0Ist
  SSDT            PmRef        Cpu0Ist
  SSDT            PmRef        Cpu0Ist
  SSDT            PmRef        Cpu0Ist
  MSDM            DELL          CBX3