[Crosspost to Windows Update newsgroup]
You receive error code 0x80070643 or error code 0x643 when you use the
Windows Update or Microsoft Update Web sites to install updates:
Start a free Windows Update support incident request:
For home users, no-charge support is available by calling 1-866-PCSAFETY in
the United States and in Canada or by contacting your local Microsoft
subsidiary. There is no-charge for support calls that are associated with
security updates. When you call, clearly state that your problem is related
to a Security Update and cite the update's KB number (e.g., KB999999).
LOOK! => If your problem relates to a Cumulative Security Update for IE,
call the above number and ask to be transferred to the "Consumer IE queue"
(which is 47830).
Support for Windows Update:
For more information about how to contact your local Microsoft subsidiary
for security update support issues, visit the International Support Web
For enterprise customers, support for security updates is available through
your usual support contacts.
~Robear Dyer (PA Bear)
MS MVP-Windows (IE, OE, Security, Shell/User)
AumHa VSOP & Admin; DTS-L.net
> When updating "Cumulative security Update for Internet Explorer 7 for
> Windows Vista (KB963027)", an error code 80070643 is shown.
> My system is Vista Ultimate SP1.
> I do not have MS Office 2003 installed, but instead MS Office 2007.
> The start type of Office Source Engine is set to Manual.
> I have also tried to download KB963027, and install it from local drive.
> However, this also failed.