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Enable USB Port in Windows XP


To enable USB Port in Windows XP / Vista you must have Administrative privilege. To do so do the followings .....

Using Device Management

You can open device management in three ways.
1. Right click My Computer on Desktop and click Manage and then Device Manager
2. Open Run and type devmgmt.msc and click OK
3. Open system propreties and click Hardware tab and then click Device Manager
Now expand Universal Serial Bus controllers. You will see enable or disable usb ports. Right click on it and click Enable.
      

    

Using Registry Editor

1. go to Start
2. click on Run or open command prompt
3. type regedit
4. click O.K or press Enter on the keyboard
5. Registry Editor window opens. Now expand the HKEY_LOCAL_MACHINE by clicking on the (+) sign
6. find System and expand it in similarway
7. find CurrentControlSet and expand it
8. find Services and expand it
9. now you need to search USBTOR and select it
10. now you can see various options in the right hand side. find Start and to open it double click on it
11. you will see the Value data 4. now change the Value data 4 to 3
12. click on O.K

Now close the Registry Editor window and insert a pen drive in the USB port. you will find that the USB Port is blocked and the pen drive is not detected by your system. to unblock it follow the above steps and change the Value data 3 to 4.

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