Vista - Have I been hacked

I am running Vista Ultimate x64.

I have noticed in the events the following:

I logon and then a special logon appears. In that special logon is the following:

sesecurityprivilege
setakeownershipprivilege
seloaddriverpriv
sebackuppriv
serestorepriv
sedebugpriv
sesystemenvironmentpriv
seimpersonatepriv

Where priv=privilege.

I am the only user on the pc and I am running as admin.

Any ideas? Am I being hacked or have I just never noticed it before and it has always been there?

I have run all manner of virus checkers, malware, anti-hack software and nothing is showing to be wrong.

You should see by default your account and the guest account. That's it. If you create additional accounts, then those would show up as well. The administrator account is hidden and, for most practical purposes, you should not run as administrator. Do you see an account listed that you did not create? Do you have sole access to the pc?