As the topic title says, the text cursor of the IDE (a single vertical line) is nearly invisible on a high definition screen. That's a major problem, as the user ends up spending quite a bit of time looking for that narrow vertical bar on the screen. And it's not correctable by the user since
1. the IDE preferences do not provide an option to fatten the cursor
2. the IDE is indifferent to the modifiable cursor width that Windows offers its user.
The following image may help to see the problem :

The text cursor is that thin vertical line barely visible on line 101 of that screenshot.