Local Update Publisher question

Question

I need to send MSXML 4.0 SP3 Parser out because for some reason WSUS says its not needed but another program that checks for vulnerabilities says its needed.  I created the package in Local Update Publisher but when I tested it a PC it was listed twice. 
Is there a way for this to check its installed in Programs and Features?  I see it does by package ID but that doesn't help as this is a new package so no one will have it.  Looking at NOT MSI Product Installed rule I am not seeing how to do
it.

Answer 1

In the case of MSXML4, I'll believe the independent checker, since otherwise the only way to get SP3 is to manually download and install it.
As for the product itself, there's only one file of interest, but it's in different locations depending on product architecure.
For x86 systems, it's ~\system32\msxml4.dll
For x64 systems it's ~\syswow64\msxml4.dll
MSXML v4 is a 32-bit only system.
What do you mean by "when I tested a PC it was listed twice"? What was listed twice? There may be multiple instances of MSXML v4 in Programs and Features, if different versions were installed at different times, but there can only be one MSXML4.DLL in the
system folder.
Testing by PackageID is one way to deal with this scenario, but I believe you'll find it much more reliable, and certainly a lot simpler, to just test the File Version on the MSXML4.DLL file. (The File Version of the SP3 file is 4.30.2100.0.)
Also consider why MSXML4 is present on a system to begin with. Is the application that installed it still present, and still in use? If not, uninstalling MSXML v4 would be a preferable action to trying to maintain it.
Lawrence Garvin, M.S., MCSA, MCITP:EA, MCDBA
SolarWinds Head Geek
Microsoft MVP - Software Packaging, Deployment & Servicing (2005-2014)
My MVP Profile: http://mvp.microsoft.com/en-us/mvp/Lawrence%20R%20Garvin-32101
http://www.solarwinds.com/gotmicrosoft
The views expressed on this post are mine and do not necessarily reflect the views of SolarWinds.