You can go to
http://v4.windowsupdate.microsoft.com/troubleshoot/ even
if you can't get to the windows update site. Here's one
of the troubleshooters I found there, hope it helps.
Problem Description:
When you attempt to use the Windows Update site, you may
receive an error message similar to the following:
Administrators Only (-2146828218) To install items from
Windows Update, you must be logged on as an administrator
or a member of the Administrators group. If your computer
is connected to a network, network policy settings may
also prevent you from completing this procedure.
You receive this message even though you are already
logged on as an administrator or a member of the
Administrators group.
Resolutions:
This issue indicates a problem accessing a resource and
may not indicate a lack of administrative privileges. One
of the resolutions below may help.
To resolve this issue, follow these steps:
1. Click "Start," and then click "Run."
2. In the Open box, type regedit and then click "OK."
3. Locate and select the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersio
n\WindowsUpdate
4. click "Edit," and then click "Permissions."
5. Click "Add," and then type "Everyone" in the
dialog box that appears.
6. Click "Check Names," and then click "OK."
7. Select "Everyone" in the "Group or user names" list.
8. Under Permissions for "Everyone," select the "Full
Control" check box in the "Allow" column. Note that
the "Read" check box in the "Allow" column is now also
selected.
9. Select each user, in turn, in the "Group or user names"
list, and then verify that no check boxes are selected in
the "Deny" column. Clear any check boxes that are selected
in the "Deny" column.
10. Click "Advanced," and then select the "Replace
permission entries on all child objects with entries shown
here that apply to child objects" check box, and then
click "OK."
11. Click "Yes" if you are prompted for confirmation.
NOTE: You should also check the firewall and the proxy
server settings and configurations, or ask the appropriate
administrator to do so.
-----------------------------------------------------------
You can work around this issue by adding the following to
the exceptions list in the Internet
Options Proxy Settings:
Windowsupdate.microsoft.com
V4.Windowsupdate.microsoft.com
Download.Windowsupdate.com
To access the Exceptions settings.
1. Open Internet Explorer
2. Click "Tools," and then click "Internet Options."
3. Click "Connections," and then click "LAN Settings."
4. Click "Advanced" and add windowsupdate.microsoft.com to
the exceptions list.
-----------------------------------------------------------
1. Open Internet Explorer, click "Tools" and then
click "Internet Options."
2. Click "Advanced".
3. Scroll down until you see "Use HTTP 1.1 through Proxy
Connections," and then select the check box.
4. Click "OK."
5. Close and restart Internet Explorer. You should now be
able to connect to Windows Update.
-----------------------------------------------------------
Rename the subdirectory C:Windows\System32\Catroot2 to
C:Windows\System32\Catroot2temp\.
Restart the computer and then try to run Windows Update.
----------------------------------------------------------
Issue Applies To:
Windows XP
