Microsoft driver msxml6_ia64.msi --- unexplained error message  

Processor is 64-bit. Secunia PSI informs me that MSXML drivers need to be updated. I go to the MS site and download the FOUR drivers. MSXML6.MSI, MSXML6_X64.MSI, MSXML6_SDK.MSI install without indication of any problem. MSXML6_IA64.MSI attempt gives an error message. After installing the MS drivers that give no problem, I do a Secunia scan again, and it tells me that I still have an outdated driver issue. What am I to do?

After reading some older posts, it seems to me that Secunia PSI may be calling out a driver as out of date when it is not. However, the MS website displays four MSI files, which I downloaded. I presume that the programming at the MS website can know what processor type my computer has, and therefore displays only appropriate MSI files. Two questions:
1. Is my presumption about the driver download website over-presumptious and incorrect?
2. What is the full explanation for the error message?