Sorry to say it didn't work, but we must be close, definetely.
Logon was set as per your advice, with a different password, I suppose,which I ignore, of course. When I typed mine, it responed to the change, saying something like "the rights are now given to.....(can't remember)", therefore a change was implemented, but I noticed that it actually starts (i.e. I click start) but it stops again in a minute. I repeated the procedure a couple of times, restarted the pc also, but when I get back again to the firewall service, I find it not running. Should I perform the same change on the BFE service?
Last thing: my pw is quite short, but after I type it in, it looks much longer. Is that normal?
Sure I won't forget to rate your services, I only wait for a happy end, which I feel very close.