Cannot see cursur as of yesterday

Last night lost ability to see mouse cursor which makes logging in and playing near impossible. Maybe hit a wrong key? Tried hitting every key and cannot restore. Thought maybe there is an easy fix? Tried making cursor larger as suggested in post on internet with no avail. Many thanks if anyone can help me!

No replies yet. Cursor came back and played for hours yesterday, but then again today logged in and after download cursor is gone again so now sure is something in download causing this!