See if the system can access the MS Malware Protection Center:
Here's a direct link to the latest definitions for Windows Defender,
x86 [32bit]: http://go.microsoft.com/fwlink/?Link...14&clcid=0x409
If not, check the HOSTS file located in
for 'undesired' entries that may have been put there by malware.
If the system is being denied updates with the error code 80244019 in
Vista and WD can not be updated, that's a tipoff that malware is likely
IF you receive an Access Denied error when attempting to view/edit the
HOSTS file: You cannot modify the Hosts file or the Lmhosts file in
> To work around this issue, follow these steps:
> 1. Click Start, click All Programs, click Accessories, right-click Notepad, and
> then click Run as administrator.
> User Account Control permission If you are prompted for an administrator password or for a
> confirmation, type the password, or click Allow.
> 2. Open the Hosts file or the Lmhosts file, make the necessary changes, and then click Save on
> the Edit menu.
Delete *any* entries in HOSTS that pertain to Microsoft.
MowGreen [MVP 2003-2009]
> Unfortunatelly, the link is not available anymore.... any solution ?
> "PA Bear" wrote:
>>How to manually download the latest definition updates for Windows Defender
>>~Robear Dyer (PA Bear)
>>MS MVP-Windows (IE, OE, Security, Shell/User)
>>AumHa VSOP & Admin http://aumha.net
>>>While Auto Updating Windows Vista Ultimate I got this message. Its related
>>>to Windows Update 929735. It downloads okay and tries to Install but in
>>>end gives the message Failed to install.
>>>If its only for Windows Defender update it should not matter much. I
>>>had problem updating Win Defender in Win XP Pro anyway.