Has Chrome begun always being on top in Windows? Here’s how to fix that when it happens. It’s so simple.
Press the ALT, SPACE, and C keys together.
The Chrome window will close.
Open it back up. (You can press CTRL, SHIFT and T together to make that happen if you like.)
Voila! No more Chrome on top.
You can now open, say, a Word document or another app and it will no longer be in back of your Chrome window.
I found this answer buried in the Chrome support forums and hope you’ll find it useful.