Hi, have you ensured that your machine is clean?
I had a similar problem recently and it turned out to be a virus that
was causing the problem. As a lot of viruses are designed disable
networks, so it makes sense that this service is targeted. It
basically stops you from viewing computers in "My network places".
From what I remeber, the computer browser service is in fact dependent
on some other services. So, in theory, it might not be this service
that is the problem but rather another one that it is dependent on.
Mark