Windows 10: Lock Screen not full screen

I searched around and couldn't find anyone else with this issue. When my computer wakes the lock screen image only fills 2/3 (roughly) of the screen, like it's working at a lower resolution. The windows background fills the whole display (4k). When I log back in all my windows are adjusted upward like they were set to a different screen size as well....but the whole screen real estate is available so no blacked out areas or anything. It just started to happen when I installed a new monitor (old one was also 4k), I didn't change any settings, but I'm sure this has something to do with it...just can't figure out what would have changed. Anyone have a clue what I should be looking to change?

:)

 

Where Is My Downloaded Files Nokia Lumia 520?

Want to setup a my family account

 

Need help with laptop when sleeping/opening laptop lid.

Hey,

I have an issue with my laptop, after an update, whenever I open my laptop lid or try to wake my my computer from sleep the screen is distorted and just shows static. I have tried reinstalling recently installed updates however this hasn't fixed the issue.
When this happens I have to hold the power button to turnoff my laptop to then turn back on my laptop for me to use it. It may not be an issue dealing with the update however this is when this issue started to occur. My warranty is expired. Please Help.

Thank You.

 

Just in case anyone else ever has this problem. I had to go to Control Panel/Display then click on the "set a custom scaling level" link and change that to 100%. Lock screen is full screen and windows no longer move around after waking.