Installed Windows incl. All updates u. Office 365, there are still 9 GB free. Certainly not really much but the thing runs like a bee so. All I need else, I have a portable apps on a 64 GB Micro-SD. OneDrive can be moved there as well. The battery life is approximately 6-8 hours depending on usage. Anyone who wants to tinker can also install Windows 10 or Windows 8.1 Pro, then about 18 GB remain free. There were only the 64bit versions for UEFI. A backup of the original partitions, you can create with Windows own applications as well as restore. The device has no fan and is not yet noticeably warm! The keyboard does not bend through like other cheap laptops.