Vista Windows Update Fails with error 80004002

Create a batch file with the following
REGSVR32 WUPS2.DLL /S
REGSVR32 WUPS.DLL /S
REGSVR32 WUAUENG.DLL /S
REGSVR32 WUAPI.DLL /S
REGSVR32 WUCLTUX.DLL /S
REGSVR32 WUWEBV.DLL /S
REGSVR32 QMGR.DLL /S
REGSVR32 QMGRPRXY.DLL /S
REGSVR32 JSCRIPT.DLL /S
REGSVR32 MSXML3.DLL /S
run it, if it doesn't fix try this


>
> I have been trying to solve this 800B0100 error for months, and last night
> solved it!
>
> For me this was the solution:
> 1. Click Start, on "Start Search", type "cmd" (without quotations mark) and
> right click the command prompt icon select Run as Administrator.
> 2. In command prompt, type the following command and Enter: regsvr32
> wintrust.dll
>
> If this doesn't work for you try the following:
> 1. Disable any Firewall, Antivirus, download accelerator software.
>
> Firewalls and Antivirus programs are 3rd Party (non-Microsoft) Programs, and
> although they are mostly effective in protecting your computer from Viruses
> and Computer hackers, they do fail to take into consideration program
> installations. The nature of these programs is that they scan everything on
> the computer, making sure to try and stop any virus-like activity.
>
>
>
> When you visit Windows Update and download, and most importantly install any
> of the updates, the update installation is always battled by the Antivirus
> and Firewall until the Antivirus clears the program of being a virus. In most
> cases, this is harmless and the Update installation goes through
> successfully. Occasionally, the Installation gets corrupted, and a process
> during the install is stopped, or interfered with by the Antivirus product.
>
>
>
> For this reason, we suggest that you disable any Antivirus or Firewall
> software while trying to install updates from Windows Update.
>
>
>
> 2. Verify the Language Settings
>
> 2.1. Start Internet Explorer.
>
> 2.2. Click "Tools", and then click "Internet Options".
>
> 2.3. Click the "General" tab, and then click "Languages".
>
> 2.4. In the "Language" list, make sure that the operating system language
> version is included. If the operating system language version is not on the
> list, click "Add", click the language in the "Language" list, click "OK",
> click "OK", and then click "OK" again.
>
>
>
> 3. Reset Internet Zone Security
>
> 3.1. Start Internet Explorer.
>
> 3.2. Click "Tools", and then click "Internet Options".
>
> 3.3. Click the "Security" tab, and then in the" Select a Web content zone to
> specify its security settings" box, click "Internet".
>
> 3.4. Click "Default Level", and then click "Apply" to set this zone to
> Medium security.
>
> 3.5. Click "OK".
>
>
>
> 4. Verify that the Date and Time Are Set Correctly
>
> 4.1 In the bottom right corner of your screen, double click the time. This
> will open the Date and Time Properties window.
>
> 4.2 Please check that all details are correct including the year, the Time
> zone and that AM/PM is set correctly.
>
> 4.3 Click OK.
>
>
>
> If the problem persists despite performing above troubleshooting steps, I'd
> like you to perform below guidelines to download and install a new Windows
> Update Agent as the current one might be corrupted.
>
>
>
> 1. Open Internet Explorer and paste on address bar
> http://go.microsoft.com/fwlink/?LinkID=91237 (for 32 bit) or
> http://go.microsoft.com/fwlink/?LinkID=91238 (for 64 bit)
>
> 2. A box will prompt to save a the Windows Update Agent file, save it on the
> Local C: drive.
>
> 3. Click Start, on "Start Search", type "cmd" (without quotation mark),
> right click the command prompt icon and Run as Administrator.
>
> 4. Type c:\WindowsUpdateAgent30-x86.exe /wuforce in the command prompt and
> Enter.
>
> 5. Follow the instructions to install the Windows Update Agent.
>
> 6. Please restart the computer after the installation.
>
> 7. After restarting the PC, click on Start and choose Windows Update and it
> will open a new Internet browser.
>
> 8. A box will prompt asking permission to install the Windows Update
> software, click Install and proceed to download the updates.
>
> If it still fails, type the following commands in command prompt, pressing
> ENTER after each line:
>
> net stop cryptsvc
> ren %systemroot%\system32\catroot2 oldcatroot2
> net start cryptsvc