Hello Kieron_wilt. I understand your computer does not turn off normally after you reinstalled Windows. This indicates that the reinstall process was not performed correctly. I would perform a new system recovery in an attempt to resolve the issue, then install the latest drivers if the issue is not resolved. Please reference this HP document for additional information: http://h10010.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c01443342
Please respond after you have attempted this, or have any other questions or concerns.
Mario