Root cannot open usb driver download

Ok me dumb lol. That was the drivers for PC.

Help please. I bought an Acer Iconia A200 tablet. I am 64 and so used to PC's. So this is new to me. I downloaded the drivers for USB from Acer but when I go to open they look like papers (corner folded over) and they show the proper files ex an .exe but when I open I get a no file found. It looks like something is turning it to PDF???
Any help would be great