I also own one with similar specs but a lesser known brand. Something that worked for me to be able to upgrade Windows 10 was this: 1. Compact.exe /CompactOS:a

I also own one with similar specs but a lesser known brand. Something that worked for me to be able to upgrade Windows 10 was this: 1. Compact.exe /CompactOS:always 2. Enable compressing the whole C drive (right click, properties) 3. Clean %TMP% and C:\Windows\Temp 4. Use the new control panel storage options to clean temporary files 5. Use the old tool to clean temporary files (the one in C drive properties) because the new panel does a half-assed job 6. Defragment the disk 7. Manually remove old downloaded updates (I can't remember the commands for this) After all those steps I had about 14 GiB free, enough to upgrade Windows. The problem with that cheap thing? Nothing after or before the 15XX editions of Windows 10 works well, Windows blocks the drivers (battery management, wireless, accelerometer, sound and a few others) due to "compatibility issues." Now I'm stuck with a version that doesn't work and unable to downgrade (windows.old is long gone). It doesn't help that Microsoft doesn't offer old .iso downloads.