We're aware of this issue but have been unable to reproduce it internally. We already have a speculative fix prepared and patched out to some players. I don't know the exact deploy schedule but I am fairly certain everyone will have the fix by patch 1.1 planned for release on Tuesday.
Since we can't reproduce it we don't know everything about the issue but the fix is geared towards working around hardware/software incompatibility problems. Based on what we know I wouldn't be worried about it damaging your PC (although I do agree in general you don't want to manually shutdown your computer as default; computers have come a long way in fault tolerance in this area over the years).