When looking for a free fax service that is compatible with Windows Vista, it's important to consider services that offer simple faxing capabilities without any special features. Given that Windows Vista is an older operating system, compatibility might be limited with newer online faxing services. One classic approach to sending faxes from Windows Vista is by utilizing a fax modem and software. Here are some steps to set up faxing on Windows Vista: 
- Install a Fax Modem: If your computer doesn't already have one, you'll need to install a fax modem. Make sure it's compatible with Windows Vista.
- Windows Fax and Scan: Windows Vista comes with a built-in fax application called Windows Fax and Scan. You can set up and...