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If the query returns a lot of results, there might not be enough memory and the system is using the swap file. Check the available physical memory on the computer that runs slowly.<br />
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An anti-virus could also intervene on some queries. Check if that computer has the same anti-virus as the others and if it is configured properly.
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The initial queries return at most 10 records / strings of no more than 30 characters each. It's not big enough to run out of memory (Dual core 3.4 Ghz, 3.5 Gigs of RAM, Windows 7). Thanks for the suggestion!<br />
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9 out of the 10 computers are identical (Software and hardware). The odd computer is mine which does not have this problem. The computer having this problem is identical to 8 other computers that do not have the problem.<br />
<br />
All computers have AVG installed. All have the same AVG settings.<br />

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If I run the program in safe mode (with networking), it's as slow as it is if the program is run in normal mode.
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I've restored the computer as far back as I was allowed - same result.<br />
I'm running an AVG scan now to see if it'll pick up anything.
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This is probably a network problem. First check ping times to your mysql server, then you can try some trace route from your slow and fast computer, if they are the same, and if these results are the same I would try to change the network card and the socket in your switch/router.
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&gt;the trust relationship between this workstation and the primary domain failed<br />
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I occasionally get that on some computers. No explanation.
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My comment is the solution to my problem. No one gave me any information on why this happened or what could have caused this problem to occur.
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<div class="content wysiwyg-content">
- The Vb.net / MySQL program <b>use to</b> run at a good speed on this computer.<br />
<br />
- The program only runs EXTREMELY slow when it runs a MySQL Query.<br />
<br />
- Currently the user finds it quicker to remote desktop into another computer and run the Vb.net program there then it is to run the program on her local machine.<br />
<br />
This is what I've done so far:<br />
- Restarted the computer.<br />
- Ran a prior version of the same program (April 2011), same results.<br />
- Uninstalled and reinstalled the .Net framework (and updates).<br />
- Uninstalled and reinstalled anything MySQL related.<br />
- Checked Windows Updates.<br />
<br />
What I'm going to do in about a half an hour:<br />
- Place the slow computer in my office &nbsp;(that has no problem running the program) and test out the program here. This will test if it's a network/wiring problem (I doubt but I'm pulling at straws right now).<br />
<br />
What do you suggest I could test to try to solve this problem?
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- The Vb.net / MySQL program use to run at a good speed on this computer.

- The program only runs EXTREMELY slow when it runs a MySQL Query.

- Currently the user finds it quicker to remote desktop into another computer and run the Vb.net program there then it is to run the program on her local machine.

This is what I've done so far:
- Restarted the computer.
- Ran a prior version of the same program (April 2011), same results.
- Uninstalled and reinstalled the .Net framework (and updates).
- Uninstalled and reinstalled anything MySQL related.
- Checked Windows Updates.

What I'm going to do in about a half an hour:
- Place the slow computer in my office  (that has no problem running the program) and test out the program here. This will test if it's a network/wiring problem (I doubt but I'm pulling at straws right now).

What do you suggest I could test to try to solve this problem?

I have a VB.Net/MySQL program that runs extremely slow on one computer but fast on all the others

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).

Network Analysis

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,

Visual Basic.NET

MySQL is an open source, relational database management system that runs as a server providing multi-user access to a number of databases. Acquired by Oracle in 2009, it is frequently used in combination with PHP installations, powering most of the WordPress installations.