Microsoft Office 2010 does not support upgrading from a prerelease version of
Microsoft Office 2010. You must first uninstall any prerelease versions of
Microsoft Office 2010 products and associated technologies.
Correct the issue﴾s﴿ listed above and re‐run setup.
I've got the error message above while I was installing the InfoPath Designer 2010. There's 2010 Filler installed but I've disable it.