Hi Vince,
I believe BSOD unexpected_kernel_ trap relates to issues with the cpu, ram or outdated/corrupt drivers. This Knowledgebase article may help you if the issue is with the cpu or ram http://kb.parallels.com/en/112091 Please make sure that your Parallels tools are up to date.
If the issue is not cpu or ram related there could be many other reasons. With this error message there should be the Trap codes these should lead you to the exact cause of the error message. You can look up the codes on Microsoft site I would look them up before I do anything else.
Last edited: Oct 23, 2016