Windows update fails and block subsequent update

Simple question : - the computer refuse to update, when installing the updates it gives an error message and all the next updates fail to install. Is there a way to make the install process resume correctly. Since i'm not a computer geek, i would appreciate help on how to investigate and solve / correct this issue. I'm a bit concerned as this has blocked several updates which some are said to be important. The SP1 went fine, but then no updates has occured since oct.2008 Thanks in advance for your guidance Best regards

Hi calabrache,

You can see if Windows Update and Background Intelligent Transfer Service (BITS) and Remote Procedure Call (RPC) in "Services" is disabled/stopped and re enable/start it again.

Start Menu-Control Panel-Administrative Tools-Services. Double click on BITS, and Windows Update to set them to Automatic/Delayed Start and Start them if they are stopped and make sure Remote Procedure Call is set to Automatic.

You can also try to reregister WU. Type cmd in the start menu search bar and right click on cmd. Click run as administrator. In the command prompt type: NET STOP WUASERV and press enter
type: REGSVR32 %WINDIR%\SYSTEM32\WUPS2.DLL and press enter
type: NET START WUASERV and press enter
Exit out of the cmd.

Restart your computer and see if it works.

Also you may want to do a malware scan with an Antivirus/Antispyware program to make sure you don't have any malicious software on your computer.

Thank you very much, i'll try your proposal and let you know, The computer gives an error message with the number 800B0100 as being an unknown error. Is there somewhere a knowledge base to look into ? Kind regards