This has been driving me nuts for over a month.
Updates that don't instal after downloading.
I get the same error code for each one: error code 80071A91
The updates are:
Internet Explorer 8 Release Candidate 1 for Windows Vista
Cumulative Security Update for Internet Explorer 8 Beta 2 for Windows Vista (KB961260)
Cumulative Update for Media Center for Windows Vista (KB960544)
I have enetred the error code on the microsoft website and it says:
No Results Found For: error code 80071A91