How do I move the blockchain file location on Windows?
Go to Settings > Options and click the Reset Options Button. Note that this will clear all of the options shown there, so note down what they all are so you can set your options again later.

In the Dialog that appears, click Yes and Bitcoin Core will shut down. Now go to the Bitcoin data directory and copy the entire thing to wherever you want it to be. The data directory on Windows is located at %APPDATA%\Bitcoin. Move the contents of the data directory to the location you want Bitcoin Core's data to be.

Start Bitcoin Core again. You should be prompted to choose the data directory. Choose a Custom data directory and set it to wherever you moved the data directory to. Then set your options again.