This laptop is great. I wasn't expecting it to be so clean and almost with zero scratches.I swapped the HD for an SSD with Win 10 and Linux.  The built-in wireless adapter (WiFi) can only take 2.4Ghz signals on the routers even with the latest Windows 10 drivers from Lenovo (Realtek).  I purchased a USB Wireless adapter that can connect to 5Ghz routers to maximize the download/upload speeds on Windows 10.Unfortunately, there isn't any supported Linux drivers (from Realtek, the manufacturer) for the built-in WiFi adapter but the USB one I purchased works with Linux.It loads very fast on both Win 10 and Linux, the screen is very sharp.I am giving it 5 stars for the quality of this particular laptop and the good condition it came with.AV