Copy and paste "%windir%\windows update.log"

ren %systemroot%\system32\catroot2\Edb.log *.tst 

regsvr32 wintrust.dll

1. Start the Administrative Tools utility in Control Panel. 
2. Double-click Services. 
3. Right-click Cryptographic Services, and then click Properties. 
4. Click Automatic for Startup type, and then click Start. 

net stop cryptsvc
ren %systemroot%\System32\Catroot2 oldcatroot2 
net start cryptsvc

1. Click Start, click Run, type regedit, and then click OK. 
2. Locate, and then click the following key in the registry: 
HKEY_LOCAL_MACHINE\Software\Microsoft\Non-Driver Signing 
3. Right-click the Policy binary value, and then click Modify.  
4. The Value data will appear in the following format:

0000  02


Press DELETE to remove the current value (02 in this example), and then type 0 (the current value will now appear as 00).  



1. Move all the tmp*.cat files out of the following folders:

%systemroot%\system32\CatRoot\{127D0A1D-4EF2-11D1-8608-00C04FC295EE} 

%systemroot%\system32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE} 
2. Type the following at the command prompt, and then press ENTER: 

net stop cryptsvc rename the %systemroot%\system32\CatRoot2 %systemroot%\system32\oldcatRoot2 net start cryptsvc  
3. Restart the failed hotfix installation or service pack installation. 


Software Update Incomplete, This Windows Update Software 
Did Not Update Successfully" Error Message When You Visit 
the Windows Update Web Site 
http://support.microsoft.com/default.aspx?scid=kb;en-us;319585 


Windows Update Troubleshooter 
http://v4.windowsupdate.microsoft.com/troubleshoot/   


Problems When Viewing or Downloading From Windows Update 
http://support.microsoft.com/?kbid=193385   


HOW TO: Troubleshoot Problems Connecting to Windows Update 
http://support.microsoft.com/default.aspx?scid=kb;en-us;818018   


Error Message: Thank You For Your Interest in Windows Update... 
http://support.microsoft.com/default.aspx?scid=kb;EN-US;234272   


How To Fix The Cryptographic Service Error 
http://www.updatexp.com/cryptographic-service.html   


Also, visit http://www.kellys-korner-xp.com/top10faqs.htm  and scroll 
down to "Why Can't I Download Updates" for additional troubleshooting ideas.