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Windows Update download stuck at 0%?
There has been some issues with some computers running vista being unable to update. This particular case involves the Windows Updater finding the required files to download, but the download progress doesnt get passed 0% and eventually an error will happen, preventing any update.

First thing you do:

-Open Internet Explorer, go in to Tools -> Internet Options.
-Select the Security tab.
-Click on the "Trust sites" icon.
-Click on the "Sites" button.
-Uncheck "Require server verifycation (http:) for all sites in this zone".
-Add the following sites to the list:
-Close the Sites window and apply changes to IE, then close IE.

Second thing you do: (Taken from a Microsoft support email)

Step 1: Turn on BITS
1. Click Start, in Start Search item, type: "notepad" (without quotes)
press Enter.
2. Copy the following commands and then paste them into the opened

set BitsRegKey=3DHKLM\Software\Microsoft\Windows\CurrentVersion\BITS
reg add %BitsRegKey% /v LogFileFlags /t REG_DWORD /d 0xfbcf /f
reg add %BitsRegKey% /v LogFileSize /t REG_DWORD /d 0x100 /f
reg add %BitsRegKey% /v LogFileMinMemory /t REG_DWORD /d 0x30 /f
net stop bits
net start bits

3. After pasting the above commands, please close the Notepad window.
Save when you are prompted to save the file. Type "register.bat" as
the file
name and choose Desktop from the left panel as the location.
4. Refer to the Desktop and right click the register.bat file, then
Run as administrator.
5. You will see a DOS-like window processing.

Please restart the computer and check the issue. If the issue
please also perform the following suggestions.

Step 2: Enter Safe Mode

1. Restart your computer and start pressing the F8 key on your
On a computer that is configured for booting to multiple operating
you can press the F8 key when you see the boot menu.

2. When the Windows Advanced Options menu appears, select Safe Mode,
then press Enter.

3. Log onto Windows by using the Administrator account or any user
with the Administrator privileges.

NOTE: In Safe Mode, your system display and Desktop will look and
differently than in Normal Mode. This is only temporary. To return the
back to Normal Mode, we can simply restart the computer.

Step 3: Enable the View Hidden Files option. To do this, follow these

1. Click Start , click Control Panel, click Folder Options, and then
the View tab.
2. Click Show hidden files and folders, and then click OK.

3. As a System administrator, locate the following folder,
and then delete all files that have a file name that begins with

To do this, follow these steps:
a. Please navigate to C:\Programdata\Microsoft\Network\Downloader
b. In the Downloader window, select and delete any files that begin
Qmgr. For example, delete the following files:


4. Please restart the computer to the normal mode.
6. Open Windows Update immediately. Obtain the latest updates.

Please note that when you go to download after you made the changes, it will stay on 0% for a few moments, but will jump in %.

Once your Windows Update is functioning correctly, it will automatically find the drivers for most (but not all) devices.
Got the same error with SBS2008 (I let it run for over 45 minutes ). Ended up just turning the power off, waited 30 seconds and then powered up again. Seemed to sort the problem out HOWEVER this was a test machine and I would NEVER recommend this as a solution to a production server. I would suggest this to a production PC or laptop as long as the data had been backed up.

RedNZ, did the steps you post fix your problem?
one of the biggest problems with windows update is the time and date on your pc, if its a little out windows update will get stuck as well.
if its alot out you will just get a error pop up.

vista service pack 2 will slove vista's problems with windows update under trusted site as it updates IE access codes as well.

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