My wife had similar problems. She was using Norton Firewall. We had to disable the firewall to use her update then re-enable it . I switched to Zonealarm Security and we have had no further problems. I find that sometimes the firewall is too good and some things will upset it. Try to access the update with the firewall turned off and go from there.
I cant connect to update windows, also i am unable to log on to my bank account, nextel, and other sites i try to log in. i have run spybot, adaware, and avg. there were some problems but i think i cleaned those up, but i dont know if there was some damage done. I have xp pro. I could really use some help on this. thanks