We have recently been made aware of a problem with the very latest version of Skype clashing with various webcam drivers. The problem is under urgent investigation. We expect this issue to be fixed in the next Skype update but our engineers are looking at whether a workaround is possible in the meantime, so please continue to check the HUE website as we'll release any updates there as soon as they're ready.
In the meantime, you should be able to solve the problem by downgrading to an earlier version of Skype for Windows. Another solution is to uninstall the camera drivers (you can still use the camera in Skype without drivers installed) until the problem is fixed.
If Skype is installed, it doesn't have to be connected and online to trigger the blue screen issue. If you definitely don't have Skype installed on the computer, please let us know.