Hi there,
I have the same problem with an E402S Asus laptop. It wants 8 gig on the C drive, whatever I do.
Mine has another nice feature now on top of it... it connects to the access point or router with a cable but blocks 95% of all web sites or doesn't provide internet at all. When I went on vacation this week, there was no internet connection at all !!! it
worked maybe for 10 minutes the first time and went in internet boycot forgood "connected, no internet". I once fixed the problem 2 months ago after 12 sleepless nights but I forgot how I did it back then.
This seems to be a bug in the old win 10 that I can't update, haha :-)
It reminds me all of the 'out of memory error' in DOS, yes that's how old I am. People never learn.
I bought this little thing because I use a web drive and don't need disk space AT ALL. Only an internet connection. I even put an extra 250 gig SSD in there just in case I want to look at and store pictures from an SD card.
Now there's not enough disk space for the operating system itself. Why does it need 21 gig anyway? What does it do other then to start up an app and show something on the screen!? Even my cheap android phone is better at it!
Anyway, I would very much like to downgrade it now to win7. But how to do that and do I have to pay for a license now? That would be great :-)
Good luck to all of you with the same problem. This really sucks doesn't it.