Hi @sylow, @coldza. If your devices have completely stopped working you should get in touch directly with the support department who can determine the appropriate course of action such as a replacement should it be deemed necessary.
I know it’s a pain but did you attempt a fresh installation of windows? You can create a new partition and install there without losing any of course existing settings.
A guide is produced here @ http://www.howtogeek.com/214477/how-to-dual-boot-two-or-more-versions-of-windows/