Issue

Christopher
Technical Support
StableBit DrivePool
2.1.1.561?
Windows 8.1 (64 bit)
Public
Alex

Try to turn off the recycling bin and then delete that folder ($RECYCLE.BIN).

Recycling bin can be turned off by right clicking on it -> Properties.

The hidden recycling bin folder can be exposed from Folder Options, like this: http://i.imgur.com/vXnalRO.png

From the error message, it sounds like an ACL issue.