try mo punta ka sa device manager tapos hanapin mo if may yellow questionmark then right click mo yun and dis-able and enable pag walang questionmark hanapin mo na lang kung san dun yung usb mo or if ayaw parin try mo sa registry naka block sya dun kaya di ma read or try mo isalang sa iba lng comp. baka usb mo may problem check mo din storage Management if na detect yung usb mo?
Ok pa ba flash drive nyo kuya? Baka sa flash drive ang problem. If hndi naman. Usb Ports doesnt require you to download any drivers now. Because of the PlugNPlay feature. Unless you unknowingly disabled the usb ports. Try checking the device manager though
Try to look up on google there are many sites that could really help you with your problem. Easiest is the registry fix. Because all settings are found on the registry.