Hi Aleks,

If you used an upgrade function to got o WIN10, you could try this±

Please make sure your documents/pictures/music etc. is safe.
Go to settings, recovery, reset this PC, chose Remove Everything (you should have your personal files safely copied on USB stick or USB HDD).
Such clean install of WIN10 normally make the system work better and will also remove older versions of the OS which saves you lots of space.

If that does not work, please claim warranty form the place of purchase.