"Waiting for device" topic

A whole day it took my to root my phone,as i had to downgrade to windows 7 from windows,HOWEVER i had to delete the windows 7 i got and get a new one due to a driver issue.Then after i rooted my phone i was looking forward to fast boot a mod i got...yet it does not work.
So i attempted to unlock the boot loader, but yet again a problem arose where i am unable to unlock it because the command prompt just says "Waiting for device" as you will see in the attachment. I.I have searched all over,done all i could,and i cant resolved the issue!So please someone end my misery and help me fix this.

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[Q] Is is worth to upgrade from Note 2 while waiting for Note Pro 8"? topic

Hello, I have a Galaxy Note 2. I don't find the need to upgrade to Note 3. I use the S-pen often to write notes and use the devise to read/annotate pdf. I also take photos very often and sometimes videos as well. I also use the voice recorder. I found the screen of the Note 2 a bit small. I have to change my glass and zoom in all the time. I have been waiting for the Note Pro 8" but disappointingly Samsung only announced the Tab Pro 8" without a S-pen. I suppose that in the summer or later this year, they will make the Note Pro 8" available. At that time, I will certainly buy it. Between now and then, I am considering whether or not to trade in my Note 2 for the Xperia Z Ultra. Any opinions appreciated.