Not sure how to explain this. In any area I need to fill in, like search on explorer, I have this annoying little thick black line before what I type.

Can you post a screen shot? Just to be sure, this is not the cursor, right?

When did this problem start? And please tell us about your hardware.

Actually found it myself, it was a setting in cursor. Thanks

Glad you sorted it out. Thanks for the followup.