See if anything here helps:
http://www.windowsreference.com/windows-vista/errors-found-code-80244019-when-trying-to-run-windows-updates-in-windows-vista/
--
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin http://aumha.net
DTS-L http://dts-l.net/
You couldn't open the page or its contents didn't help? If the former, try
this link instead: http://snipurl.com/2lys7
Did you attempt to install Vista SP1 via Windows Update or manually?
What anti-virus application or security suite is installed? What
anti-spyware applications (other than Defender)? What third-party firewall
(if any)? Were any of these applications running in the background when you
attempted to install SP1?
> ...Windows Defender is not able to look for new definitions.
Understandable, as Defender updates via Windows Update. Was Defender able
to update OK prior to the attempt to install SP1?
I would recommend disabling your anti-virus application before installing or
uninstalling Vista SP1.
Since the problem only started after you manually installing Vista SP1, you
can try 2 things:
1. Uninstall Vista SP1 (with your anti-virus application disabled), reboot,
and see if the behavior persists.
How to uninstall Windows Vista SP1 as a troubleshooting step:
http://support.microsoft.com/kb/948537
or...
2. Open a free support incident:
Unlimited installation and compatibility support for Vista SP1 is available
at no charge through 18 Mar-09
• US:
http://support.microsoft.com/oas/default.aspx?ln=en-us&prid=11274&gprid=500921
• CA:
http://support.microsoft.com/oas/default.aspx?ln=en-ca&prid=11274&gprid=500921
• UK:
http://support.microsoft.com/oas/default.aspx?ln=en-gb&prid=11274&gprid=500921
• AU:
http://support.microsoft.com/oas/default.aspx?ln=en-au&prid=11274&gprid=500921
• Other: http://support.microsoft.com/oas/default.aspx | select Windows
Vista | select Windows Vista Service Pack 1
In the search pane type in services
scroll down to Win HTTP Web Proxy Auto-Discovery Service
Right Click and go to - properties
In the "properties" pane look for startup type
select - Automatic
Make sure you select "Automatic" and not "Automatic delayed start"
Click - "Apply" and then "Ok"
Restart computer and then search for UPDATES
Worked fine for me, hope it helps others out.