0x80096010
= Trust_E_Bad_Digest - The digital signature of the object did not verify
Reinstall the ActiveX controls :-
Download the appropriate version of the Windows Update Agent to a known location and install.
x86-based versions of Windows - download the WindowsUpdateAgent30-x86.exe package now.
http://go.microsoft.com/fwlink/?LinkID=91237
x64-based versions of Windows - download the WindowsUpdateAgent30-x64.exe package now.
http://go.microsoft.com/fwlink/?LinkID=91238
Itanium-based versions of Windows - download the WindowsUpdateAgent30-ia64.exe package now.
http://go.microsoft.com/fwlink/?LinkID=91239
Click Start, click Run, click Browse, locate the file that you saved and then click Open.
Add the /wuforce switch to the end of the run command, and then click OK. For example, the run command may appear as the following: "C:\WindowsUpdateAgent30-x86.exe" /wuforceClick Run.
Follow the steps to complete the wizard.
Reboot.
Also see:
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/sag_cmautorootupdt.mspx
Automatic updating of trusted root authorities
To turn on automatic updating of trusted root authority certificates
1. In Control Panel, open Add or Remove Programs
2. Click Add/Remove Windows Components.
3. Select the Update Root Certificates check box.
4. Click Next, and then click Finish.
Note
To open Add/Remove Windows Components, click Start, click Control Panel, click Add or Remove Programs, and then click Add/Remove Windows Components.
You cannot install some updates or programs
http://support.microsoft.com/kb/822798