HT4061 my computer unable to connect itunes server

Question

my computer unable to connect itunes server,even itune help is also not connect to server
the massage will be "iTunes Help is unavailable because your computer isn’t connected to the Internet.

Answer 1

in diagnostics report
Microsoft Windows 7 x64 Home Basic Edition (Build 7600)
Dell Inc. Inspiron 1545
iTunes 11.0.0.163
QuickTime not available
FairPlay 2.2.32
Apple Application Support 2.3.2
iPod Updater Library 10.0d2
CD Driver 2.2.3.0
CD Driver DLL 2.1.3.1
Apple Mobile Device 6.0.1.3
Apple Mobile Device Driver 1.63.0.0
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 00DABA000B0C13D0
Current user is not an administrator.
The current local date and time is 2012-12-12 11:43:11.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is supported.
Core Media is supported.
Video Display Information
Intel Corporation, Mobile Intel(R) 4 Series Express Chipset Family
Intel Corporation, Mobile Intel(R) 4 Series Express Chipset Family
**** External Plug-ins Information ****
No external plug-ins installed.
iPodService 11.0.0.163 (x64) is currently running.
iTunesHelper 11.0.0.163 is currently running.
Apple Mobile Device service 3.3.0.0 is currently running.
**** Network Connectivity Tests ****
Network Adapter Information
Adapter Name:    {A21769EE-B8FA-43A8-ACC9-8B4AC6B200C6}
Description:    Microsoft Virtual WiFi Miniport Adapter #2
IP Address:    0.0.0.0
Subnet Mask:    0.0.0.0
Default Gateway:    0.0.0.0
DHCP Enabled:    No
DHCP Server:   
Lease Obtained:    Wed Dec 31 16:00:00 1969
Lease Expires:    Wed Dec 31 16:00:00 1969
DNS Servers:   
Adapter Name:    {61D7CACF-EC6D-4ED3-BAE8-0FE3AC647BFF}
Description:    Dell Wireless 1397 WLAN Mini-Card
IP Address:    192.168.1.5
Subnet Mask:    255.255.255.0
Default Gateway:    192.168.1.1
DHCP Enabled:    Yes
DHCP Server:    192.168.1.1
Lease Obtained:    Wed Dec 12 09:36:06 2012
Lease Expires:    Thu Dec 13 09:36:06 2012
DNS Servers:    192.168.1.1
Adapter Name:    {27D403C7-FE78-4FBE-B11B-6D449ACA2B11}
Description:    Bluetooth Device (Personal Area Network)
IP Address:    0.0.0.0
Subnet Mask:    0.0.0.0
Default Gateway:    0.0.0.0
DHCP Enabled:    Yes
DHCP Server:   
Lease Obtained:    Wed Dec 31 16:00:00 1969
Lease Expires:    Wed Dec 31 16:00:00 1969
DNS Servers:   
Adapter Name:    {EAB5F805-06F2-4343-AB41-C1BB2A0028F5}
Description:    Marvell Yukon 88E8040 PCI-E Fast Ethernet Controller
IP Address:    0.0.0.0
Subnet Mask:    0.0.0.0
Default Gateway:    0.0.0.0
DHCP Enabled:    Yes
DHCP Server:   
Lease Obtained:    Wed Dec 31 16:00:00 1969
Lease Expires:    Wed Dec 31 16:00:00 1969
DNS Servers:   
Active Connection:    LAN Connection
Connected:    Yes
Online:        Yes
Using Modem:    No
Using LAN:    Yes
Using Proxy:    No
Firewall Information
Windows Firewall is off.
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.
iTunes has never successfully accessed the iTunes Store.