main.go:14:2: no required module provides package golang.org/x/sys/windows: go.mod file not found in current directory or any parent directory; see 'go help modules'

This error message is indicating that the package 'golang.org/x/sys/windows' is not found in any of the required modules. It is possible that the module containing the package is not installed or has not been imported properly.

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

1. Check if the required module is installed by running the command 'go list -m all'. This will list all the installed modules along with their versions.

2. If the module is not installed, you can install it using the command 'go get golang.org/x/sys/windows'. This will download and install the module along with its dependencies.

3. If the module is already installed, make sure that it is imported properly in your code. You can check this by verifying that the import statement for the package is correct and matches the actual package name.

Once you have resolved the issue, you should be able to compile and run your code without any errors.