[pmania]

Which tools put that before the video files ? Since I once succefully was able to remove the DRM from protected files back in 2007, but don't know for sure anymore which programs I used back then. I think it was some .exe in a dos box.

[Stream Recorder]

FairUse4WM (http://undrm.info/remove-DRM-protection/FairUse4WM-freeware-DRM-removal-Windows-software-Strip-copy-protection-from-WMV-ASF-WMA-Windows-Media-Player.htm) uses the [NoDRM] prefix. Other programs may use it as well.

[pmania]

Does it work under Windows 7 ?
Or under Windows XP mode ?

[Stream Recorder]

There are instructions in the forum that allow to make it work in Windows XP. I don't really know about Windows XP mode in Windows 7.