i have system in home and in the system USB port is making some kind of problem that i have mentioned below in quote. this was the message i got when i insert usb device in the usb port. please help me to solve this problem.
You have what's called a 'ghost usb device' Solution: A ‘ghost usb’ is created sometimes when you don’t bother using the ‘Remove Hardware’ option you’re supposed to when you disconnect a usb device from a computer. Windows then assumes it is still present and keeps the drivers loaded ready for use. The problem with this is if it didn’t load properly in the first place. If they still exist Windows wont reinstall the drivers so you’re stuck with it. * Make sure the problem USB device/s are not connected – i.e. any flash drives. * Right-click on MyComputer then choose Properties, then choose the Advanced tab. * Click on Environment variables down at the bottom of the page. * Choose ‘New’ in the SYSTEM variables box. A new Box will open. * In Variable name type: DEVMGR_SHOW_NONPRESENT_DEVICES * In Variable value type: 1 * Then click ok on the various options until the Properties box disappears. Now open up Device Manager. To do this right-click on MyComputer, choose Properties then choose the Hardware tab. Click on Device Manager. When this opens, click View (at the top) then select ‘Show hidden devices’. Device manager will now show the usual hidden devices and the Ghosted ones. The Ghosted ones are recognisable as they are shadowed / greyed out. Expand ‘USB Controllers’ by clicking on the + sign. Uninstall each ghost usb device showing (probably a number of them). If you have an entry called Other or Unknown devices do the same. In my case I got rid of all my ghost usb devices. Reboot your computer. Source
wow! very nice tutorial mcfox! setting system variable is new to me. I am now trying it myself. thanks!
Well, I have also got a problem in my device. Whenever I try to format it, it says WRITE PROTECTED. And I am not able to delete or format anything from it. Its of Samsung by the way!
Run > cmd Type in the phrase "attrib -r +s" followed by the location of your flash drive, such as "attrib -r +s E:\" if your flash drive is designated as the "E:\" drive on your computer. Press "Enter" to enter the command and remove the Read Only feature from the drive.
Well, I checked it and the Read Only feature is already unchecked even then I am not able to delete it. May be its time to get a new USB device.:| - Mr.President -