Front ends work in windows 7 64bit I know because I have used dos box and a front end on my laptop, though I admit I can't remember what one that was
The only reason I can think that / would be replaced with ] would be that the keyboard is incorrectly setup with dosbox us mixed with uk.. I dunno (you could try different symbols until the correct one shows though)
You are right. The problem is the \ and ]. I tried in other computer and it worked. I don't know what's wrong with my keyboard. It works fine in other software. Do you know how can I set the keyboard right? Many thx!
Anyway another way is to use a popper system emulator that will emulate the system hardware and you install/run real dos in that, if you have the Enterprise and Ultimate version of win7 64bit you can get virtual PC from Microsoft for free
http://www.microsoft.com/windows/virtual-pc as a nice extra you can get windows XP with it for free
If not there is something called Virtual box found at
https://www.virtualbox.org/ that is also a machine emulator that lets you chose what OS it uses
Dos and or up to Windows 2K should do the trick but best to stick to dos to be honest, do not forget to load sound and mouse drivers for dos though