Installation Failure: Windows failed to install the following update with error 0x80070643: Visual Studio 2005 Service Pack 1.
And then, off to the download page here: Microsoft® Visual Studio® 2005 Team Suite Service Pack 1
Wowzers! A whole 432 MB download! No wonder WSUS choked. Might not be the reason, but it sure could be.
A little ways down the download page we find:
- Under certain conditions when installing on Windows Server 2003 or Windows XP, a digital signature verification error can occur. Please see Knowledge base article 925336 for details and resolution.
- Then on to KB925336: Error message when you try to install a large Windows Installer package or a large Windows Installer patch package in Windows Server 2003 or in Windows XP: "Error 1718. File was rejected by digital signature policy"
The above is a, "just in case" it doesn't work. :D
Download it, run the install, and all should be good!
Microsoft Small Business Specialists