Your resolution might not be calibrated correcly.
1). Right Click on your desktop background -> Click "Screen Resolution" -> Change the Resolution to the max setting for your TV, perhaps "1920 x 1080" for instance.
2). Make sure you're using the same cable, too, as you use on the PS4.
3). In your TV settings, change the AV display mode to "PC".
Cheers mate hope this helps.
Bonus: Type "ClearType" in the windows start menu and calibrate your font size.