ITunes 10.6.3.25 for Windows : not connecting to iTunes store

Question

Unable to connect the iTunes to internet on office network. Works well with Home network.  The Internet Options - connectivity tab  is configured as "Use Automatic Configuration Script" which details the proxy address used by the company.
On running the daignostics on iTunes with network connectivity test option, following is the result:
Secure link to iTunes store failed. The help tab also does not help saying internet connectivity unavailable!
  Microsoft Windows XP Professional Service Pack 3 (Build 2600)
LENOVO 2007EG7
iTunes 10.6.3.25
QuickTime 7.7.1
FairPlay 1.14.43
Apple Application Support 2.1.9
iPod Updater Library 10.0d2
CD Driver 2.2.0.1
CD Driver DLL 2.1.1.1
Apple Mobile Device 5.2.0.6
Apple Mobile Device Driver 1.59.0.0
Bonjour 3.0.0.10 (333.10)
Gracenote SDK 1.9.6.502
Gracenote MusicID 1.9.6.115
Gracenote Submit 1.9.6.143
Gracenote DSP 1.9.6.45
iTunes Serial Number 0013AC2C0ADFEE90
Current user is an administrator.
The current local date and time is 2012-08-06 11:46:35.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is not supported.
Core Media is supported.
Video Display Information
ATI Mobility Radeon X1300
**** External Plug-ins Information ****
No external plug-ins installed.
Genius ID: 783b6d8530b2d8a65519a6ca42949f46
iPodService 10.6.3.25 is currently running.
iTunesHelper 10.6.3.25 is currently running.
Apple Mobile Device service 3.3.0.0 is currently running.
**** Network Connectivity Tests ****
Network Adapter Information
Adapter Name: {E89EAFE3-2B75-4C1E-8396-1AF7B6642EE3}
Description: Intel(R) PRO/Wireless 3945ABG Network Connection - McAfee NDIS Intermediate Filter Miniport
IP Address: 10.140.10.175
Subnet Mask: 255.255.255.0
Default Gateway: 10.140.10.5
DHCP Enabled: Yes
DHCP Server: 10.140.46.66
Lease Obtained: Mon Aug 06 10:55:08 2012
Lease Expires: Mon Aug 06 18:55:08 2012
DNS Servers: 10.140.46.66
10.140.46.99
10.140.70.66
Adapter Name: {59D768F6-8447-4271-8DF1-A0BC1CE49D57}
Description: Intel(R) PRO/1000 PL Network Connection - McAfee NDIS Intermediate Filter Miniport
IP Address: 10.140.10.52
Subnet Mask: 255.255.255.0
Default Gateway: 10.140.10.5
DHCP Enabled: Yes
DHCP Server: 10.140.46.66
Lease Obtained: Mon Aug 06 10:55:10 2012
Lease Expires: Mon Aug 06 18:55:10 2012
DNS Servers: 10.140.46.66
10.140.46.99
10.140.70.66
Active Connection: LAN Connection
Connected: Yes
Online: Yes
Using Modem: No
Using LAN: Yes
Using Proxy: No
Firewall Information
Connection attempt to Apple web site was unsuccessful.
The network connection timed out.
Basic connection to the store failed.
The network connection timed out.
Connection attempt to Gracenote server was successful.
The network connection timed out.
Last successful iTunes Store access was 2012-08-05 18:45:56.

Answer 1

iOS 6 requires iTunes 10.7. Here are the system requirements for iTunes 10.7.
Windows System Requirements
PC with a 1GHz Intel or AMD processor and 512MB of RAM
Windows XP Service Pack 2 or later, 32-bit editions of Windows Vista or Windows 7
64-bit editions of Windows Vista or Windows 7 require the iTunes 64-bit installer
250MB of available disk space
Broadband Internet connection to use the iTunes Store
Macintosh System Requirements
Mac computer with an Intel Core processor and 512MB of RAM
OS X version 10.6.8 or later
Safari 4.0.3 or later
400MB of available disk space 
Broadband Internet connection to use the iTunes Store