For $win_NT$.~BT it looks like you can delete it.It is a temporary Windows XP setup folder. But my personal advice on this is to remame the files and bive it a week to see if anything goes wrong before deleting them.
What is ransomware and how do I protect my PC from WannaCry?
Disney layout supervisor Rob Dressel on the challenges of visualising Moana
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.