Actually a good idea.
As a first with connection problems you can always post your realmlist.wtf contents here instead of making a screenshot.
Cooy/paste should be enough.
Since the clients used are known to be working there is a large chance the problem is at the user end.
Only without a clear description you cant be sure.
Also if you downloaded a zipped or rar folder first unzip it.
Does wow start?
Do you see a login screen?
Do you hear sound/music?
Only black screen?
Error message upon logging in?
Stuck on connecting or retrieving character list?
Able to connect but nothing happens?
Questions , questions and more questions.
Im IT guy myself also for work, and for every case: need more information!