What are these files for?
stdole2.tlb
oleaut32.dll (600kb)
olepro32.dll
asycfilt.dll
comcat.dll

We're required to include them with our setup, however I found that some of them (oleaut32.dll) are included in all version of windows since Win95.

Are these files needed for setup extraction/installation of are they just VB runtimes?

Since oleaut32.dll is pretty big and came with Win95 - WinXP, can I safely exclude it from my setup programs?