Having error messages on your pc such as a d3dx9_33 dll not found error can be quite irritating. Many times it comes from nowhere, right after you restart your computer, and the second you get it you probably try to understand what happened and how it can be solved. Read my short article and you'll see how easy it can be to remove this error from your system.
First of all, there is no need to be worried - with computers there isn't a problem that can't be solved. First you need to know what dll files are. Dlls are part of any program; they contain data which enables your installed software(s) to run. Problems related to these files usually take place after installing an updated software version over an old installation, and when removing applications from your pc. When something goes wrong during installation/upgrade/un-install, then this is the point where you start experiencing these concerning problems.
Fortunately, many of these problems are 'repairable' even if you are not an expert - you can quite fast 'clean' a d3dx9_33 dll not found error by running a well designed Windows registry fixing utility. These types of programs focus on scanning your Pc and fixing various windows problems including 'corrupted' DLLs. The easiest way to try and remove these irritating messages can be done by installing one of these utilities and letting it scan your pc - most of them offer free scans.
Before spending more of your time on frustrating web searches, or hiring an expert to fix this d3dx9_33 dll not found error, I would advise you to simply download one of these registry fixing tools and let it automatically examine your entire system's dlls, locate and fix the problem(s) that you've encountered (there might be several hundreds to several thousands of dll files in your computer). Take the opportunity - a wide range of of these tools not only provide free scans, but free repair (partial repair), so there's a chance that'll you'll be able to 'clean' this problem in just a few minutes from now.