2013 Sony Vaio Ultrabook SVP13215PLS came with Win 8, upgraded to 8.1 and now to Win 10 Pro. System boots and works for a few minutes then shuts down. Won't stay on long enough to fully download and install Win10 updates. 8 meg RAM. No sound from fan so it may not be working. Running BIOS R1045V7. No problem restarting and running every time. Just shuts down after about 5 minutes and seems to have trouble updating Windows while its on.