6th generation Ipod nano not recognised in itunes

Question

When I plug my ipod into my laptop, it is recognised in my computer but not in itunes or as a device when trying to safely remove it.
I tried plugging my 4th generation ipod nano into my laptop but again the same thing happens.
I tried plugging it into a different laptop and my 4th generation was recognised but my 6th wasn't. In another laptop, my 6th generation was recognised in itunes and worked fine.
I have tried resetting my ipod both ways, uninstalling itunes and reinstalling, using different USB ports and uninstalling everything apple related and reinstalling it but that hasn't solved the problem.
My laptop was sent away to have the hard drive replaced and this problem has happened since but that doesn't explain why it worked in another laptop but not in another one.
Can anyone suggest anything else I could do to try to make it work?
My laptop runs windows 7.
Thank you!

Answer 1

I've tried all of the USB 2.0 ports on my laptop and I have tried using a different cable.
I've tried resetting the ipod whilst connected to the laptop and still isn't recognised.
I am working through the iPod not recognised in 'My Computer' and in iTunes for Windows:
Step 1: didn't help
Step 2: didn't help
Step 3: didn't help
Step 4: Empty your Temp directory and restart - When I tried to delete the Temp folder, a message came up saying 'action can't be completed because the folder or file is open in another program' but I didn't have anything else open so I can't delete that folder.
Step 5: Verify that the Apple Mobile Device USB Driver is installed - when I opened the Device Manager window, it was empty, there was nothing, so I couldn't continue with that step.
Step 6: didn't help
Step 7: I've already tried to remove and reinstall iTunes and it hasn't helped
Step 8: Disable conflicting System Services and Startup Items - I did this and restarted my laptop then tried opening iTunes but it said Bonjour had been disabled so I enabled it but setting it to Automatic and then opened iTunes but the iPod still wasn't recognised.
Step 9: I turned off security and tried but he iPod still wasn't recognised
Step 10: doesn't apply to me as I'm using Windows 7
I've tried the steps in iPod troubleshooting assistant and they haven't helped.
I've put it into disk mode and its still not recognised.
My ipod isn't Macintosh-formatted.
My ipod doesn't sync via FireWire.
I have now worked through each and every single suggestion from Apple.
I have run a device connectivity test with the iPod attached and here are the results:
Support services: iPod support service is running (green)
                  iTunes Helper is not running (red)
                  Apple Mobile Device is not running (amber)
Ports: USB ports verified (green)
       No FireWire ports found (green)
       No iPod, iPhone or iPad found (red)
Device Sync Tests: No iPod, iPhone or iPad found (red)
Microsoft Windows 7 x64 Home Premium Edition Service Pack 1 (Build 7601)
SAMSUNG ELECTRONICS CO., LTD. 300E4C/300E5C/300E7C
iTunes 10.7.0.21
QuickTime 7.7.3
FairPlay 2.2.19
Apple Application Support 2.2.2
iPod Updater Library 10.0d2
CD Driver 2.2.3.0
CD Driver DLL 2.1.3.1
Apple Mobile Device 6.0.0.59
Apple Mobile Device Driver 1.62.0.0
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 00D7AE1C033D0928
Current user is not an administrator.
The current local date and time is 2012-11-27 22:45:34.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is supported.
Core Media is supported.
Video Display Information
NVIDIA, NVIDIA GeForce 610M
NVIDIA, NVIDIA GeForce GT 620M
Intel Corporation, Intel(R) HD Graphics Family
Intel Corporation, Intel(R) HD Graphics Family
Intel Corporation, Intel(R) HD Graphics Family
Intel Corporation, Intel(R) HD Graphics 4000
**** External Plug-ins Information ****
No external plug-ins installed.
**** Network Connectivity Tests ****
Network Adapter Information
Adapter Name:        {FD1953DA-7EE0-4CAC-B856-852249377319}
Description:            Atheros AR9485WB-EG Wireless Network Adapter
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:     Thu Jan 01 00:00:00 1970
Lease Expires:       Thu Jan 01 00:00:00 1970
DNS Servers:        
Adapter Name:        {04AC2129-0CAE-458D-A5AD-DE6950E4C3DB}
Description:            Realtek PCIe GBE Family Controller
IP Address:             144.124.124.44
Subnet Mask:          255.255.248.0
Default Gateway:    144.124.127.254
DHCP Enabled:      Yes
DHCP Server:         144.124.127.254
Lease Obtained:     Tue Nov 27 22:06:16 2012
Lease Expires:       Thu Nov 29 22:06:16 2012
DNS Servers:         144.124.16.12
                                144.124.16.11
Active Connection: LAN Connection
Connected:             Yes
Online:                    Yes
Using Modem:        No
Using LAN:             Yes
Using Proxy:           No
Firewall Information
Windows Firewall is on.
iTunes is NOT enabled in Windows Firewall.
Connection attempt to Apple web site was successful.
Connection attempt to browsing iTunes Store was successful.
Connection attempt to purchasing from iTunes Store was successful.
Connection attempt to iPhone activation server was successful.
Connection attempt to firmware update server was successful.
Connection attempt to Gracenote server was successful.
Last successful iTunes Store access was 2012-11-27 22:34:48.
**** Device Connectivity Tests ****
iPodService 10.7.0.21 (x64) is currently running.
iTunesHelper is currently not running.
Apple Mobile Device service 3.3.0.0 is currently not running.
Universal Serial Bus Controllers:
Intel(R) 7 Series/C216 Chipset Family USB Enhanced Host Controller - 1E26.  Device is working properly.
Intel(R) 7 Series/C216 Chipset Family USB Enhanced Host Controller - 1E2D.  Device is working properly.
No FireWire (IEEE 1394) Host Controller found.
**** Device Sync Tests ****
No iPod, iPhone or iPad found.