Started up WIN10 immediately after hooking up to the web. Very solid little computer, well built, with indicator lights for 'on, disk access, wifi and bluetooth'. Runs cool with an oversized and hardly audible fan.The BIOS as shipped is extremely versatile and still supports 'legacy' operating systems such as WIN7 with superb online Lenovo driver support.Ubuntu of course no problem at all.It does need an SSD and possibly a memory upgrade to 8GB although 4GB works surprisingly well for day to day use (not for gaming). For the more ambitious, try a i54590T processor or one of the widely available Xeons.