WinXP/Version8/Cannot Connect

Question

Have not been able to connect for weeks. There is nothing unusual about my setup, in fact it was working on this same connection about a month ago. Have not been able to connect to the store or the upgrade server. I've followed every direction in the knowledge base. Help?
Microsoft Windows XP Home Edition Service Pack 3 (Build 2600)
FUJITSU 0000000000
iTunes 8.0.2.20
QuickTime 7.5.5
FairPlay 1.1.11
CD Driver 2.0.7.5
CD Driver DLL 2.1.1.1
Apple Mobile Device 2.1.2.7
Bonjour 1.0.6.2 (118.5)
iTunes Serial Number B1587B6DAB29E2B0
Current user is an administrator.
The current local date and time is 2009-01-20 22:42:43.
iTunes is not running in safe mode.
Video Display Information
ATI MOBILITY RADEON 9600/9700 Series
** External Plug-ins Information **
No external plug-ins installed.
** Network Connectivity Tests **
Network Adapter Information
Adapter Name: {76D0B273-4F12-4160-820F-98D338B8779F}
Description: Atheros AR5001X+ Wireless Network Adapter - Packet Scheduler Miniport
IP Address: 192.168.1.4
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
DHCP Enabled: Yes
DHCP Server: 192.168.1.1
Lease Obtained: Tue Jan 20 22:28:56 2009
Lease Expires: Wed Jan 21 21:39:22 2009
DNS Servers: 192.168.1.1
192.168.1.1
Active Connection: LAN Connection
Connected: Yes
Online: Yes
Using Modem: No
Using LAN: Yes
Using Proxy: Yes
HTTP Proxy: actsvr.comcastonline.com:8100
SSL 3.0 Support: Enabled
TLS 1.0 Support: Enabled
Firewall Information
Windows Firewall is on.
iTunes is enabled in Windows Firewall.
Connection attempt to Apple web site was successful.
Connection attempt to iTunes Store was successful.
Secure connection attempt to iTunes Store was unsuccessful.
An unknown error occurred (-50).
Secure connection attempt to iPhone activation server unsuccessful.
An unknown error occurred (-50).
Last successful store access was 2008-12-14 02:06:15.

Answer 1

Are you running any of Symantec's (Norton) or McAfee's Internet security products or anything similar, or an antivirus/antispyware application? There have been reports that some such utilities treat an upgrade to iTunes as a new application and can block the application from connecting. So you have to go in and reset the utility to allow iTunes. The same thing can happen if you upgrade the security product (this has particularly been a problem with recent McAfee upgrades).
Check the settings for your utility. If iTunes is still listed, remove and re-enable the exception for iTunes. Consult your utility's documentation for the appropriate procedure; you can find instructions for Norton on Norton's web page for iTunes. You may also need to check the built-in Windows firewall as well.
Hope this helps.