File Sharing

[martin56]

We have a computer that we use on our network as a file
storage device of sorts. It is shared across our network
to users authorized as domain users.

It has been working great for about three years until last
weekend.

All file sharing has been removed.

I can turn on sharing and set permissions, but no security
tab is avalible.

I have cleared the "simple file sharing" as suggrested
with no help.

I don't know how the security tab disapeared or how to get
it back.

I have run a virus check and the computer is clean.