@edgrimm "Only offers PXE boot option" usually caused by a failed HDD or SSD. Download the maintenance manual for your computer [https://download.lenovo.com/consumer/mobiles_pub/lenovo_g_z_50_series_hmm.pdf|from here] Check something like [https://www.youtube.com/watch?v=F8zaFeBqg1U|this video] to get into the BIOS. Change your boot order and see if it will boot from a different drive. Ultimately this does sounds like a failed system drive.