I have been running bitcoin core on Windows 7 for several years, and I can't remember exactly how I set it up. Now I plan to switch to Windows 10.

Currently, the data is on a separate drive from the program, in F:\abc\def\xyz\blocks\. Obviously abc, def and xyz are not the actual paths, but you get the idea.

I'm puzzled, because the bitcoin.conf file in C:\program files\bitcoin does not contain anything but comment lines. So, how does the program know where to find the blockchain? After all, it's on a separate drive.

When I install bitcoin on Windows 10, I want it to continue to use the existing blockchain in F:

Advice would be most welcome.