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Can MDAC 2.5 install over 2.6 or higher?

April 26, 2017install MDAC

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Can MDAC 2.5 install over 2.6 or higher?

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I’m aware of some MSI’s that contain the MDAC 2.5 merge module. I just wanted to confirm that if one attempts to install MDAC 2.5 on a W2K (or WXP) machine that has MDAC 2.6 or higher, that the OS would prevent such a thing from happening. I tried to install MDAC 2.5 manually (from Microsoft’s site) on a W2K PC that had MDAC 2.7 and I got an error message saying that MDAC 2.5 was already installed on the PC. Also, I figured that even if the install was allowed to proceed using an MSI, that Windows Installer rules would prevent the older files from overwriting the newer ones on the PC. I have an application that other people developed that attempted to install MDAC 2.5. I just want to make sure that it 1) it would not have installed anyway and 2) any key functionality the developer used in MDAC 2.5 would be upwardly compatible in 2.7. Thanks in advance for anybody’s opinion.