The answers have been edited to include the column and "none of the above" has been changed. I will award back points. My apologies as I didn't notice the missing...

This is SQL Server 2005 Developer edition, correct?

Did the database grow? Could autogrow have jumped by xxGB?

The code is SSC2010

It takes $100 of the early bird rate

Have you limited memory for both instances? If not, they will be fighting for resources and causing issues.

The dates have been edited. Much of this is from last year, but there are a few new items.

What's the error? You have put something in the subject, but that doesn't show up. The error needs to be in the post. Also, there are some non-English characters in...

SQL is Structured Query Language. It's a language designed for querying sets of data (http://en.wikipedia.org/wiki/SQL)

SQL Server is a RDBMS, database product, from Microsoft. It is built to run on Windows,...

I work for Red Gate, but their tool or any other compare will do this very inexpensively. It sounds like a decent sized purchase for your boss, but consider your...

Those white papers cost money. The payback is salesman contacting people and making some sales. It's the same thing for contests. They pay for the prices when making a few...

You can use the DAC if you are a local administrator to connect and reset things

http://blogs.msdn.com/sqlexpress/archive/2005/09/08/462609.aspx

So, in addition to doing a restore, you need to check your hardware. This could happen again.

Did you upgrade SQL 2000, or add a 2008 instance or do something else? If you have two instances, you might be eating up memory as well.

Have you run this from just SSMS or SQLCMD?

I doubt this is corrupting tempdb, but it would be good to run this without a VB client to see more details.

As a hint, a cross tab or PIVOT might be what you need.