26.Are Thunderbolt devices hot pluggable using Windows with Boot Camp?
The iMac (Retina 5K, 27-inch, Late 2014) and the Mac mini (Late 2014) support hot pluggable Thunderbolt devices using Windows 8 or 8.1 (both as 64-bit only).
For all other Mac computers, Windows 7, 8, and 8.1 scans and activates Thunderbolt devices connected to Thunderbolt ports only during the Windows startup process. If your device was not plugged in at start up, Windows will not detect it without a restart.