Do you know what the update is that fails? I guess the easiest way to see it is instead of using auto update, use Custom Update and see what needs to be installed.
I have also seen were some people have suggested this is caused by spy-ware on your system. Perhaps a in-depth scan would eliminate that possibility.
Personally I would not worry much about HP updates. The only time I would think of doing such updates is if I were having a problem with my system and an update directly addressed the issue. In fact I would go as far as to remove the HP updater.
Now Windows Updates are a different matter and should be done as they often cover security issues.
The HP Update program (bloatware, in my opinion) doesn't work with Vista very well, even though the system would have been bought with Vista pre-installed.Vista.
If you want to get rid of the HP Updates program, go to the Start menu and into the 'Control Panel'. Select "Programs & Features". The program is called 'HP Update'. You can Uninstall that program there if you like. You can manually check for updated hardware drivers by going to the HP site's
Drivers and Downloads area, and entering your Desktop Model Number.
The HP Updates program also seems to have problems with various software/hardware firewalls, particularly when running Windows Vista, preventing it to search for and download optional driver updates for your HP computer.
HP says that hpsudelpacks.exe is a virus which affects mostly the automatic downloading of hp updates. go to their website and download the realtek audio driver manually to see if you can actually download updates to begin with. You should update any spyware or virus program if you have to and then shut down my computer and restart in safe mode. When in safe mode , run windows defender found here http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
, then run avg virus program found here http://free.avg.com/download?prd=afe
, then restart your computer, click on hp update in my start button area, and you should able to download another update.