Best Buy offers the 4.9-lb. Toshiba Satellite Radius Intel Skylake Core i7 2.5GHz 15.6" 4K Ultra HD 2-in-1 Touchscreen Laptop in Carbon Gray, model no. P55W-C5316-4K, bundled with Kaspersky Internet Security 2016 3-User for Windows/Mac/iOS/Android for $549.99 with free shipping. That's $450 off list and the best price we've seen for Toshiba 4K laptop. It functions as a laptop or tablet and features an Intel Core i7-6500U 2.5GHz Skylake dual-core processor, 15.6" 3840x2160 (4K UHD 2160p) IPS LED-backlit touchscreen, 12GB RAM, 1TB hard drive, 802.11ac wireless, Bluetooth 4.0, backlit keyboard, USB 3.0, Ethernet, 3-cell battery, and Windows 10 Home 64-bit. Deal ends May 14.