According to this site
http://www.microsoft.com/downloads/...fd-3a74-43c5-8ec1-8d789091255d&displaylang=en
these are the system requirements of installing WSE 3.0:
"Supported Operating Systems: Windows 2000 Professional Edition ; Windows
2000 Server; Windows Server 2003; Windows Server 2003 Service Pack 1;
Windows Server 2003, Enterprise x64 Edition; Windows Server 2003, Standard
x64 Edition; Windows XP; Windows XP 64-bit; Windows XP Home Edition ;
Windows XP Professional Edition ; Windows XP Service Pack 1; Windows XP
Service Pack 2
PC with Pentium 400 MHz or faster processor; Pentium 800 MHz or faster
recommended
96 MB of RAM (128 MB or higher recommended)
Microsoft Internet Information Services (IIS) 5.x or 6.0 and
One of the following is required:
Microsoft Visual Studio 2005
Microsoft .NET Framework SDK version 2.0
Note: IIS is not required when using SOAP messages with the TCP protocol.
Note: WSE 3.0 is not supported if installed on a computer with a version of
the .NET Framework earlier than 2.0 or a version of Visual Studio earlier
than Visual Studio 2005. "
I would say that WSE needs to be installed separately, that the .net updates
didn't include it. But it also looks like it needs more than just .net. (I
love the "128MB or higher recommended.")
Did the software install at all, or did it quit and back itself out of the
installation? If it backed out, you might try downloading the runtime from
this site and installing it first, then retry your software.