I installed SQL Server 2005 first. I did a cusotm install on VS2005 and the setup said it "failed" to install SQL Server Express with an error, but everything else was installed just fine.

I also have the "Force Encryption" option for the SQL Server 2005 Network Connections set to "No".<BR><BR>This is as default an install on Windows XP Professional as possible.

Microsoft posted on April 18, 2006 the RTM version of Service Pack 1 for SQL Server 2005 Developer, Workgroup, Standard, Enterprise, and Express editions. Get the lowdown on SP-1's added features, ...

Microsoft’s support for SQL Server 2005 ends in April and just like with Server 2003, you should take the end-of-life announcements from Microsoft seriously.