The exact same effect happens with SetProcessDPIAware(1). The IDLE checkboxes are in fact affected; they're tiny. I discovered that I was able to prevent the issue by using `ctypes.windll.shcore.SetProcessDpiAwareness(0)`. This prevents the issue only if it is called prior to the SetProcessDPIAware call.

This code does not have any issues (everything is correctly scaled)

```
import tkinter as tk
from tkinter import ttk

import ctypes
ctypes.windll.shcore.SetProcessDpiAwareness(0)
ctypes.windll.user32.SetProcessDPIAware()

w = tk.Tk()
ttk.Checkbutton(w, text = "Checkbox").grid()
w.mainloop()
```

If the SetProcessDpiAwareness call comes after the SetProcessDPIAware call, then the error persists. I believe that this is because Windows only listens to the first DPI configuration call, so it ignores subsequent calls. I was unable to find documentation to support this though.