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Windows 7 usb ports not working all the time
I have been having a problem lately where non of my usb ports will work except for the mouse and keyboard sometime. Non of my external hard drives are recognized. Went into device manager and the computer don't show hard drives. After either restarting several times or clicking scan for hard drive changes it will finally work. I have tried several different fixes people have posted to permanently fix with no success. Any help would be appreciated, thanks.