could not lock config file C:/Program Files/Git/mingw64/etc/gitconfig: Permission denied

This error message indicates that the Git configuration file located at C:/Program Files/Git/mingw64/etc/gitconfig could not be locked because the user does not have the necessary permissions to access the file.

To resolve this issue, you can try the following steps:

1. Ensure that you have administrative privileges on your computer.

2. Check if any other program or process is currently using the Git configuration file. If so, close or terminate that program/process.

3. If you are using Git Bash, try running it as an administrator. Right-click on the Git Bash icon and select "Run as administrator".

4. If none of the above steps work, you can try changing the ownership of the Git configuration file to your user account. To do this, right-click on the file, select "Properties", go to the "Security" tab, click on "Advanced", click on "Change" next to the owner name, and select your user account. Then, click "Apply" and "OK" to save the changes.

Once you have resolved the permission issue, you should be able to lock and modify the Git configuration file without any problems.