WTF first of all VB6 is ghay, you mean VB2005\2008?
Jk, but seriously consider^^.
KK what you do is open up the install folder, Press [CTRL] + [F], then click All Files And Folders, Then search ".exe", After all the search results are in. Press "Control [A]", and right click to properties, then choose "Run in admin mode, and in compatibility tap, press Windows 2005, Err I think theres an XP one there too. Then open up the installer folder, There should be one that says Setup, and another with "installer" or somthing, click installer.