To fix fax sending issue in Windows Vista:
- Click Start >in search field type “regedit“ hit Enter
- Navigate to HKEY_LOCAL_MACHINESOFTWAREMicrosoftFax
- On the right pane find and click on ArchiveFolder
- Check if the value of the key is C:ProgramDataMicrosoftWindows NTMSFax if not fill it
note:The location can be D: or any other windows installation folder - Reboot your Vista


