Cannot edit Outlook 2003 signature file

Are you using Outlook 2003 with Windows Vista and trying to edit your signature using Advanced Edit? Then you might be come cross this error message.

cannot open the file Extension H(.) file

That does not explain much but the solutions for this error is quite simple.

In Windows Vista, go to Control Panel (Classic Mode) and go to default programs. Select Associate file type or protocol with a program and scroll down to .htm and click Change Program select Word 2003.

This will solve the problem.

There is a longer version for this as well (Not Recomended). You can manually change the signature file from the signature folder. Default location (Users > > App Data > Microsoft > Signature)

select the file and open with Word and do the editing you want and Save it. If Outlook is open the files would be read only so better to close outlook before editing the file.