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jis k zarye aap aik time me 5 Usb aak sath chala skte hai or jitne marzi card reder mai laga k downloading kare...
Sub se pehly..

Below are the steps you need to follow to discover the USB ID for an installed device.

1. Open Device Manager from the Control Panel.
2. Find the device in the list of devices. USB drives will typically be located under the Disk drives section.
3. Right-click the USB device and select Properties, which will open up the device property sheet, as shown in Figure 2.
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Figure 2: Select the Properties of your USB storage device from Device Manager

4. Select the Details tab from the USB Properties sheet.
5. Click the dropdown list labeled Property
6. Select the Hardware Ids option, as shown in Figure 3.
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Figure 3: The Device class GUID is what you will use for the hardware ID for the policy

With this USB ID you can create and configure a GPO. To configure a GPO to include the USB ID and restrict the installation of the device, follow these steps on a computer where the USB device has not been installed.

1. Click the Start button, select Run, then type gpedit.msc, then click the OK button. (If you have UAC enabled you will need to agree to allow the Group Policy editor to run. For more information on UAC refer to Understanding UAC in Vista.)
2. Expand Computer Configuration|Administrative Templates|System|Device Installation|Device Installation Restrictions, as shown in Figure 4.
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Figure 4: You will configure policies under the Device Installation Restrictions node to control USB devices

3. Double-click on the Prevent installation of devices that match any of these hardware IDs policy.
4. Select the Enabled radio button.
5. Click on the Show button to open the Show Contents dialog box.
6. Click the Add button on the Show Contents dialog box.
7. Type in the ID for the USB drive using the syntax shown in Figure 5.
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Figure 5: Hardware restriction policy input uses the Hardware ID from the device

8. Save all of your settings from within the policy and exit the editor.

Now that you have your policy set up, you can test the installation of the USB drive. After you plug in the USB drive on the computer where you configured the GPO, you should get an error message similar to the one shown in Figure 6. You only need to click on the icon in the tray to see this dialog box.
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Figure 6: If the policy denies the installation of the device, a message can be displayed

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