USB has Disapeared

[Guest]

I tried to access my MP3 player recently and discovered my USB ports are not
showing up in the device manager. I have tired them all and with my printer
as well. The computer doesn't recogize the devices are plugged in. How do I
get my USB ports back?

 

[Alec S.]

I tried to access my MP3 player recently and discovered my USB ports are not
showing up in the device manager. I have tired them all and with my printer
as well. The computer doesn't recogize the devices are plugged in. How do I
get my USB ports back?

Open a command prompt (Run->cmd) and type the following:

set devmgr_show_nonpresent_devices=1
set devmgr_show_details=1
start devmgmt.msc

Now select "Show hidden devices" from the View menu. Is there a "Universal Serial Bus controllers" branch near the bottom? If so,
expand it and see if there's any grayed (absent) items. Try removing them and select "Scan for hardware changes". Also, try
deleting the driver cache (deltree /y \windows\inf\*.pnf), and rebooting to rebuild the driver cache before automatically
installing.