Software update not connecting?

[benlee]

I am the only one experiencing a network error? I am connected to the internet.

 

[NAG]

Without more information looking at this it seems to be an issue with wireless authentication.

Improves function when connecting to a TLS-authenticated wireless network; addresses a "error -1001" issue that could occur when more than one client certificate is stored in a keychain.

 

[jlc007]

No, it's not just you.

I've had this problem for months and have called Apple and they say it's my ISP's problem and have called ISP and they said they have no known Mac issues. I have no problem connecting to the internet, just get that dumb -1001 error whenever I launch Software Update.
It's REALLY annoying.🙁

 

[AlanKat]

software update says not connected to internet

Software Update says not connected to internet
Can't attach files through webmail
YouSendIt says not connected to internet

Used to work.

Whats going on please.