WINDOWS XP + SP2 + AUTO UPDATE

I have seen a problem and would like to solve it.

In Windows XP with SP 1, and later installed service pack 2 which has auto
update enabled.
The Norton Antivirus was also working fine and the intenet connection too.

After some which were downloaded by the auto windows update ,updates were
installed and the computer restarted the following errors are noted .Kindly
do give a solution.

1.An error Symantec Email Proxy comes up and the Antivirus's Auto protect
is disabled, after manually enabling the Auto protect it works.

2. An error Cannot load phone book Error 5 appears some times

3.The Internet connection does not work and the Error 720 is shown.

4.The Security center says Firewall is disabled. When we manually try to
enable it through the services, the message Could not start the Windows
Firewall/Internet Connection Sharing (ICS) service on Local Computer. Error
2.The system cannot fine the file specified.

Are these all inter linked.

Kindly suggest remedy. and would be grateful if you would mail me to
with detailed solution.

Thanks