Many People have the same problem include me. my laptop was installed windows 8.1 and face the problem of wireless features. windows 8.1 is cannot showing wiifi adhoc with open authentication. Actually this features was hidden by microsoft. we can detect adhoc wifi manually with Command prompt but this way is complicated.
How to fix its . now you can watch tutorial video below. how to fix its. You can install third parties software which is get it from video below.download wifi scanner