Windows 7: Windows Validated and Updater is no longer working, programs disabled

Please download the Farbar Service Scanner from

http://www.bleepingcomputer.com/download/farbar-service-scanner/

Right-click on the saved file and select 'Run as Administrator', and tick all the options, then click on the Scan button - copy and paste the report to your response.

Farbar Service Scanner Version: 04-08-2013
Ran by Shawn (administrator) on 11-08-2013 at 06:47:58
Running from "C:\Users\Shawn\Downloads"
Windows 7 Home Premium Service Pack 1 (X64)
Boot Mode: Normal
****************************************************************
Internet Services:
============
Connection Status:
==============
Localhost is accessible.
LAN connected.
Google IP is accessible.
Google.com is accessible.
Yahoo.com is accessible.

Windows Firewall:
=============
mpsdrv Service is not running. Checking service configuration:
The start type of mpsdrv service is OK.
The ImagePath of mpsdrv service is OK.
MpsSvc Service is not running. Checking service configuration:
Checking Start type: ATTENTION!=====> Unable to open MpsSvc registry key. The service key does not exist.
Checking ImagePath: ATTENTION!=====> Unable to open MpsSvc registry key. The service key does not exist.
Checking ServiceDll: ATTENTION!=====> Unable to open MpsSvc registry key. The service key does not exist.
bfe Service is not running. Checking service configuration:
Checking Start type: ATTENTION!=====> Unable to open bfe registry key. The service key does not exist.
Checking ImagePath: ATTENTION!=====> Unable to open bfe registry key. The service key does not exist.
Checking ServiceDll: ATTENTION!=====> Unable to open bfe registry key. The service key does not exist.

Firewall Disabled Policy:
==================

Action Center:
============
wscsvc Service is not running. Checking service configuration:
Checking Start type: ATTENTION!=====> Unable to open wscsvc registry key. The service key does not exist.
Checking ImagePath: ATTENTION!=====> Unable to open wscsvc registry key. The service key does not exist.
Checking ServiceDll: ATTENTION!=====> Unable to open wscsvc registry key. The service key does not exist.
Action Center Notification Icon =====> Unable to open HKLM\...\ShellServiceObjects\{F56F6FDD-AA9D-4618-A949-C1B91AF43B1A} key. The key does not exist.

Windows Update:
============
Windows Autoupdate Disabled Policy:
============================

Windows Defender:
==============
WinDefend Service is not running. Checking service configuration:
Checking Start type: ATTENTION!=====> Unable to open WinDefend registry key. The service key does not exist.
Checking ImagePath: ATTENTION!=====> Unable to open WinDefend registry key. The service key does not exist.
Checking ServiceDll: ATTENTION!=====> Unable to open WinDefend registry key. The service key does not exist.

Windows Defender Disabled Policy:
==========================
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender]
"DisableAntiSpyware"=DWORD:1

Other Services:
==============
Checking Start type of SharedAccess: ATTENTION!=====> Unable to retrieve start type of SharedAccess. The value does not exist.
Checking ImagePath of SharedAccess: ATTENTION!=====> Unable to retrieve ImagePath of SharedAccess. The value does not exist.
Checking ServiceDll of SharedAccess: ATTENTION!=====> Unable to open SharedAccess registry key. The service key does not exist.
Checking Start type of iphlpsvc: ATTENTION!=====> Unable to open iphlpsvc registry key. The service key does not exist.
Checking ImagePath of iphlpsvc: ATTENTION!=====> Unable to open iphlpsvc registry key. The service key does not exist.
Checking ServiceDll of iphlpsvc: ATTENTION!=====> Unable to open iphlpsvc registry key. The service key does not exist.

File Check:
========
C:\Windows\System32\nsisvc.dll => MD5 is legit
C:\Windows\System32\drivers\nsiproxy.sys => MD5 is legit
C:\Windows\System32\dhcpcore.dll => MD5 is legit
C:\Windows\System32\drivers\afd.sys => MD5 is legit
C:\Windows\System32\drivers\tdx.sys => MD5 is legit
C:\Windows\System32\Drivers\tcpip.sys => MD5 is legit
C:\Windows\System32\dnsrslvr.dll => MD5 is legit
C:\Windows\System32\mpssvc.dll => MD5 is legit
C:\Windows\System32\bfe.dll => MD5 is legit
C:\Windows\System32\drivers\mpsdrv.sys => MD5 is legit
C:\Windows\System32\wscsvc.dll => MD5 is legit
C:\Windows\System32\wbem\WMIsvc.dll => MD5 is legit
C:\Windows\System32\wuaueng.dll => MD5 is legit
C:\Windows\System32\qmgr.dll => MD5 is legit
C:\Windows\System32\es.dll => MD5 is legit
C:\Windows\System32\cryptsvc.dll => MD5 is legit
ATTENTION!=====> C:\Program Files\Windows Defender\MpSvc.dll Reparse point on file detected.
C:\Windows\System32\ipnathlp.dll => MD5 is legit
C:\Windows\System32\iphlpsvc.dll => MD5 is legit
C:\Windows\System32\svchost.exe => MD5 is legit
C:\Windows\System32\rpcss.dll => MD5 is legit

**** End of log ****

You have been infected by a variant of the Sirefef Trojan.
How do I remove Sirefef (ZeroAccess) trojan? - ESET Knowledgebase should help - and you should repost in the Malware forums for specialist assistance.

That particular Trojan is not found on my system. Ran it in normal mode, and safe mode.

In that case, I suggest that you post the Farbar report in the malware section here, and get advice from the experts there.