I have upgraded an Iconia (which came with W7 home premium preinstalled) to W8pro, but all "Iconia functions" are now gone, second touchscreen rendered useless, and after trying to revert back to W7 I ended up with W8 formatting drive C: (wtf?) thus erasing the backup copy (windows.old dir) of W7 and all Acer software, and AFAIK also the original startup W7 partition.
No help from Acer website nor any answer from Acer support nor from Microsoft. It seems no W8 driver are available from Acer whatsoever, but it seems runng W7 drivers works for a few things in 8. Any tips appreciated from this learned Community! cheers