I have a fairly new computer in our office (less than 6 months old) which, when re-booting, freezes at the "Lenovo" splash screen and doesn't get anywhere near booting up. In the past, I've experienced similar situations where I've found an external device connected to one of the USB drives of the computer. In this case, no external devices are connected to this computer and when I finally am successful booting up this PC, it's been after unplugging it from the power entirely (not just a shut down) and couple tries later before it boots up. Is this a hardware issue or could there be something simple that I need to look at? It is under warranty but the down time is something I was hoping to avoid. Any ideas?