This box came with Win7 home premium. I did an update to Win10, which took "forever", which shortly corrupted and rendered itself and the Win7 backup unaccessible. In trying to recover, I installed Linux Mint.
I've since found that Win10 needs a bios update, and found such at this website and d/l'ed to another computer, and the Asus website now no longer has anything at all for the M3900G.
I am going now to try to update the BIOS, but the process found uses Rufus so it's a double process to make a Rufus DOS disk plus adding the BIOS update to that, and then bring it onto this Acer box.
I've done my due diligence on this process so far, but this is way differenc from the "good old days", so I'd appreciate any input.