We do not make a PC version; however, the instructions seem to be far more straightforward:
- From the Start Menu, click Run.
- Type %APPDATA%\Microsoft\Signatures and then press Enter.
- Ensure your signature has a .htm (not .html) extension, and place it into this folder. The name of your signature will be the same as this filename.
- Open Outlook; you should see your new signature in the list!
Note, in some newer versions of MS Outlook, it appears the pathname may be different, i.e.:
The word 'Signatures' may also be localized, e.g., it could be 'Firmas' in a Spanish configuration.