Windows 10 Border around programs

[Goldnickle]

After updating to the new Content creators update all my apps have a weird color border and I can't seem to change it I had watched some videos about the new update and all of their program borders were fine there is also a invisible border where hidden icons are along with the wifi, volume apps. Is there any way to fix this or do I need to reinstall windows or if there is a way to fix it/ make it look similar to the old version that would be great

 

[Neemobeer]

In the personalize settings try changing the theme.