without any proper info nobody will be able to help you, please be way more clear and submit error reports & the fbx file in question.
additional info you should be giving:
Where did you get the .fbx file from or did you make it yourself, if so what program.
How big is the .fbx file in filesize and polycount.
unless you downloaded some weird *** fbx file from an untrusted source, fbx cannot brick your computer.