An acer laptop should have a bootable recovery partition with the win 10 install files on it.
Power it down fully by holding power for 10 seconds .
Then power up while holding the ALT button left of spacebar while continually jabbing the F10 key.
You should get recovery, reinstall, factory reset options
EDIT :- Thought id read acer aspire v5 somewhere - must be getting threads mixed up.
That said all laptops with preinstalled windows have recovery partitions , what laptop is it ??