I have the same problem in a Windows 7, 64 Bts system with a Microsoft Security Essentials for antiviruses, only that I have around 12 of them,I have::
6 with the error code 8050A005,
2 with the error code 80070670,
and one 800096010,
one 20000001,
one FFFFFFFF and,
one FFFFFFF1.
Here are the messages:
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.123.5.0)
Installation date: 3/21/2012 7:14 AM
Installation status: Failed
Error details: Code FFFFFFEF
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.121.1421.0)
Installation date: 3/13/2012 7:57 AM
Installation status: Failed
Error details: Code 80070670
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.121.772.0)
Installation date: 3/2/2012 6:28 AM
Installation status: Failed
Error details: Code 8050A005
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Security Update for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008, Server 2008 R2 for x64 (KB2656351)
Installation date: 2/24/2012 2:56 PM
Installation status: Failed
Error details: Code 20000001
Update type: Important
A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it. You can help protect your system by installing this update from Microsoft. After you install this update, you may
have to restart your system.
More information:
http://go.microsoft.com/fwlink/?LinkID=237373
Help and Support:
http://support.microsoft.com
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.121.61.0)
Installation date: 2/21/2012 6:56 PM
Installation status: Failed
Error details: Code 8050A005
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.119.1065.0)
Installation date: 1/31/2012 9:49 PM
Installation status: Failed
Error details: Code 8050A005
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.117.2828.0)
Installation date: 1/13/2012 9:26 AM
Installation status: Failed (later was sccesfully installed)
Error details: Code 8050A005
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.117.2546.0)
Installation date: 1/9/2012 7:06 PM
Installation status: Failed
Error details: Code FFFFFFF1
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.117.2059.0)
Installation date: 12/31/2011 11:36 AM
Installation status: Failed
Error details: Code 8050A005
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.117.70.0)
Installation date: 12/1/2011 8:29 AM
Installation status: Failed
Error details: Code 8050A005
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.115.831.0)
Installation date: 10/29/2011 11:24 AM
Installation status: Failed
Error details: Code 80070670
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739
Definition Update for Microsoft Security Essentials - KB2310138 (Definition 1.113.1394.0)
Installation date: 10/11/2011 6:59 AM
Installation status: Failed
Error details: Code 80096010
Update type: Optional
Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.
More information:
http://go.microsoft.com/fwlink/?LinkID=154739
Help and Support:
http://go.microsoft.com/fwlink/?LinkID=154739