Disk management won't load

Partition Wizard can also sometimes run Partition Wizard Check File System
on drives which will not show up in Windows to correct this.

But if they show up in Safe Mode can you run a Disk Check?

Disk Mgmt failure requires SFC. If you've run that repeatedly with no fault found, then check for infection with Malwarebytes and SUPERAntiSpyware - Downloads - full scans, decline trial version. Also replace your AV with Microsoft Security Essentials and run a full scan. Then consider a Repair Install.

Other steps to go over your install thoroughly which normally will turn up clues in Troubleshooting Steps for Windows 7

i get this error a lot:

Code:

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

Validation Code: 0
Cached Online Validation Code: 0x0
Windows Product Key: *****-*****-Q6MMK-KYK6X-VKM6G
Windows Product Key Hash: 289NoAWl2ZoVfuieux/315WkDIc=
Windows Product ID: 00426-OEM-8992662-00173
Windows Product ID Type: 2
Windows License Type: OEM SLP
Windows OS version: 6.1.7601.2.00010100.1.0.001
ID: {02E382A8-810E-4A2B-A498-F65F0BE9ECFD}(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)\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>{02E382A8-810E-4A2B-A498-F65F0BE9ECFD}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-VKM6G</PKey><PID>00426-OEM-8992662-00173</PID><PIDType>2</PIDType><SID>S-1-5-21-1656379749-942277320-3067376988</SID><SYSTEM><Manufacturer>To Be Filled By O.E.M.</Manufacturer><Model>To Be Filled By O.E.M.</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>P2.30</Version><SMBIOSVersion major="2" minor="7"/><Date>20120629000000.000000+000</Date></BIOS><HWID>A7FE3107018400FE</HWID><UserLCID>0424</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>Central Europe Standard Time(GMT+01:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>_ASUS_</OEMID><OEMTableID>Notebook</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, OEM_SLP channel
Activation ID: 7cfd4696-69a9-4af7-af36-ff3d12b6b6c8
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00426-00178-926-600173-02-1060-7601.0000-3072012
Installation ID: 022251342710972212867010875765727085683180082511067983
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: VKM6G
License Status: Licensed
Remaining Windows rearm count: 3
Trusted time: 18.5.2014 11:24:41

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0xC004C32A
HealthStatus: 0x0000000000000000
Event Time Stamp: 4:26:2014 09:09
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: NgAAAAMAAQABAAIAAgABAAAAAgABAAEAln0mUU40dxbivfA9GsOweVwS1sDeiJr5HoK6Li5z

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            ALASKA        A M I
  FACP            ALASKA        A M I
  HPET            ALASKA        A M I
  MCFG            ALASKA        A M I
  ASF!            INTEL          HCG
  SSDT            Intel_        AoacTabl
  AAFT            ALASKA        OEMAAFT 
  SSDT            Intel_        AoacTabl
  SSDT            Intel_        AoacTabl
  SLIC            _ASUS_        Notebook

Ok, thank you.

If Computer Management dose not load from right clicking Computer in the start menu and selecting manage from the list all you have to do is load it manually from the start menu by typing compmgmt.msc /s in the search bar!