Thank you for the help MowGreen [MVP 2003-2009]
I will buy a new HD and test the install on it.
It worked in installing 3.5 but Exp Web would not complete the install.
There must be other problems with my XP home. This is part of what I
Aaron Stebner's WebLog
NET Framework Troubleshooting Guide:
Removal/Cleanup tool to fix .NET Framework install failures
(and uninstall failures)
"This cleanup tool will delete shared files and registry keys
used by other versions of the .NET Framework. So if you use it,
be prepared to repair or reinstall any other versions of the
..NET Framework that are on your computer to get them
to work correctly afterwards"
Description of the Windows Installer CleanUp Utility
(If all else fails)
Note: Read the "Summary" section of this article
so you fully understand what the Installer Cleanup Utility
can and can not do.
When you try to install an update for
..NET Framework 1.0, 1.1, 2.0, 3.0, or 3.5,
you may receive Windows Update error code "0x643"
or Windows Installer error code "1603" :