[lubuntu-devel] File system goes to read-only mode permanently and suddenly after installing Lubuntu 16.04.2

[Vadim]

Hello!
After installing Lubuntu 16.04.2 x64 from ISO 
(http://cdimage.ubuntu.com/lubuntu/releases/16.04.2/release/lubuntu-16.04.2-desktop-amd64.iso), 
file system on logical drive started to go to read-only mode after some 
time. And this time is changing: first time after installing, it 
happened after a couple of hours, but on third time, it happened even 
after 10 minutes. I can't do anything after this, only reboot computer 
manually. This is very bad, I hadn't this bug on Lubuntu 16.04.1 x64! I 
even didn't installed any programs, but some popular like Chromium etc.
Please, help me with it. It's impossible to work with feeling that 
computer may freeze in any time (I think, it may be even soon when I'm 
writing this letter).