iTunes won't detect iPhone for Windows 7
Verify if you have Apple Mobile Device USB Driver
1. Connect the device to the computer.
2. Quit iTunes if it launches.
3. Click the Start menu, right-click on Computer, and choose Properties.
4. In the upper-left corner, click Device Manager. The Device Manager window should open.
5. Click the plus (+) icon (or disclosure triangle () for Windows 7) next to Universal Serial Bus controllers to expand this selection.
6. Locate the Apple Mobile Device USB Driver in this list.
If the Apple Mobile Device USB Driver is not listed, proceed to the steps below-
If the Apple Mobile Device USB Driver is not listed
1. Disconnect the device from the computer.
2. Save a screenshot by pressing the Home button and the Wake/Sleep button at the same time (the screen should flash briefly). Note: Taking screenshots and saving images on iPod touch requires iOS version 2.0 or later.
3. Reconnect the device to the computer.
4. Open the Device Manager in Windows as follows:
Windows XP: Click Start > Run. In the resulting dialog type devmgmt.msc and press Return on the keyboard.
Windows Vista or Windows 7: Click Start. In the dialog, type devmgmt.msc and press Return on the keyboard. If Windows needs your permission to continue, click "Continue".
5. Expand all the sections labeled below (not all sections may be listed):
Imaging Devices
Other Devices
Portable Devices
Universal Serial Bus Controllers
6. Look for the entry that recognizes the device as a camera. This entry should be called Apple iPhone, Apple iPad, or Apple iPod.
7. Right-click the Apple iPhone, Apple iPad, or Apple iPod entry in Device Manager and choose Update Driver from the shortcut menu.
8. Click "Browse my computer for driver software."
9. Click "Let me pick from a list of device drivers on my computer."
10. Click the Have Disk button. (If the Have Disk option is not present, choose a device category such as Mobile Phone or Storage Device if listed, and click next. The Have Disk button should then appear.)
11. In the "Install from Disk" dialog, click the Browse button.
12. Use this window to navigate to the following folder:
C:\Program Files\Common Files\Apple\Mobile Device Support\Drivers.
Note: If using a 64-bit version of Windows, this folder may be stored in C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\Drivers.
Double-click the "usbaapl.inf" file which is listed in this folder. (This file will be called "usbaapl64.inf" if you have a 64-bit version of Windows).
13. Click OK in the "Install from Disk" dialog.
14. Click Next and finish the driver-installation steps. Open iTunes to verify that the device is recognized properly.
Wala
.....you will have your Iphone back to its actual use!!!!