Windows Prompting for Re-Activation, no hardware change

I just got a notice that says I need to re-validate my Windows within three days because of a recent major hardware change. However, I've made no changes to my system whatsoever; the hardware it came with when I purchased about a year and a half ago is the same hardware I'm using now.

However, this is not the default OS that the computer came with when it was manufactured. I bought it used, and Windows 7 was put on it with a disc. I don't have the activation key for my Windows, but I did a check and it is genuine.

Is there anything I can do to fix my problem?

okay, here is my diagnostic data

Code:

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

Validation Code: 0
Cached Online Validation Code: 0x0
Windows Product Key: *****-*****-8Q2J4-V6G46-8JJR3
Windows Product Key Hash: LliA4C5x8Ggy2RuBCKm1LenfVEk=
Windows Product ID: 00426-437-4995465-85946
Windows Product ID Type: 5
Windows License Type: Retail
Windows OS version: 6.1.7601.2.00010100.1.0.001
ID: {716E62F8-0FAF-4DCC-BAE5-CA71C836FABB}(3)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Ultimate
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)\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>{716E62F8-0FAF-4DCC-BAE5-CA71C836FABB}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-8JJR3</PKey><PID>00426-437-4995465-85946</PID><PIDType>5</PIDType><SID>S-1-5-21-4130733242-2077076887-1860887608</SID><SYSTEM><Manufacturer>Hewlett-Packard</Manufacturer><Model>HP Pavilion dv7 Notebook PC</Model></SYSTEM><BIOS><Manufacturer>Hewlett-Packard</Manufacturer><Version>F.49</Version><SMBIOSVersion major="2" minor="4"/><Date>20090817000000.000000+000</Date></BIOS><HWID>88BA3807018400F6</HWID><UserLCID>0409</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>Eastern Standard Time(GMT-05:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>HPQOEM</OEMID><OEMTableID>SLIC-MPC</OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults>  

Spsys.log Content: 0x80070002

Licensing Data-->
Software licensing service version: 6.1.7601.17514

Name: Windows(R) 7, Ultimate edition
Description: Windows Operating System - Windows(R) 7, RETAIL channel
Activation ID: ac96e1a8-6cc4-4310-a4ff-332ce77fb5b8
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00426-00170-437-499546-01-1033-7600.0000-0222013
Installation ID: 010702211892351471402984510146782303651452746321202730
Processor Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88338
Machine Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88339
Use License URL: http://go.microsoft.com/fwlink/?LinkID=88341
Product Key Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88340
Partial Product Key: 8JJR3
License Status: Additional grace period (KMS license expired or hardware out of tolerance)
Time remaining: 2820 minute(s) (1 day(s))
Remaining Windows rearm count: 4
Trusted time: 9/4/2014 5:33:27 PM

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x80072EE2
HealthStatus: 0x0000000000000000
Event Time Stamp: 9:4:2014 17:33
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: OgAAAAIAAwABAAEAAQAEAAAAAgABAAEA6GFw9E40aHVGZBAzpAPEmlrG3ojqRUQBmFTc4ayK3rt+KA==

OEM Activation 1.0 Data-->
N/A

OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: yes
Windows marker version: 0x0
OEMID and OEMTableID Consistent: yes
BIOS Information: 
  ACPI Table Name	OEMID Value	OEMTableID Value
  APIC			HPQOEM		SLIC-MPC
  FACP			HP    		TRINITY 
  HPET			HPQOEM		SLIC-MPC
  BOOT			HPQOEM		SLIC-MPC
  MCFG			HPQOEM		SLIC-MPC
  SLIC			HPQOEM		SLIC-MPC
  SSDT			AMD   		PowerNow