The reason I am reinstalling is because I installed a preview copy of Windows 8, designed specifically for modern touch screens.
Unfortunately it is apparently not yet ready, as the second screen became totally inoperative, blank, in any configuration.
It also made the recovery partition totally inaccessible, something unique in my experience.
I had already burnt recovery discs (and have now successfully used them) but the reason I was trying to install a perfectly legitimate retail copy of Win 7 64 bit was time (the Iconia requires an external optical drive and it takes about two hours) and to try to avoid loading all the dross which Acer includes and then having to uninstall it.
Having satisfied your curiosity, any ideas why a straight install of Win 7 from a Microsoft disc, which installed (with several reinstalls) on a previous touch screen Acer)would not even get past the "Windows is loading files" screen?
I have recently spent two days trying to install a genuine and unused DVD of W7 on a Vista machine. Five times, the install just hung without asking for the COA. On the sixth time, it went as it should. Not logical, captain!