Windows 10 freezes after viewing pdf online?

After viewing an online document in pdf format, my laptop freezes. This is a Lenovo ideapad 110 and has had the problem since it was bought from Curry's/PC World in April 2017.
How can I prevent this happening again as I have to close the browser (AOL in this case) to start things going again.

Just thaw it out usually works for me

Download the pdf document first. Use Adobe to view it.

Enserio