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USB not recognized on windows vista home basic?

well i have a very unique problem that's wat i think i have toshiba Satellite A135 with windows vista home basic n i have been using it for 3 yrs. for the past days i have noticed that all my 4 USB ports are not working. 2 out of 4 says "USB not recognised" whenever i plug in any of the flash drive or my cell phone cable. rest 2 gives a really interesting problem. whenever i plug in any flash drive i can c that its driver is picked up n installing n finally it installs the driver for that particular drive n i can c the small USB icon in the right bottom icon tray but whenever i open my computer i only see my C drive my DVD drive n external drive icon but whenever i try to open it it shows that drive is empty and on another external drive once plugged i can only see my C drive n DVD drive in my computer no sign of external drive ther.. now this is really strange, i have tried it with windows Vista home basic n windows 7 both give the same problem. i m really in a bad situation i have so much of my work on my external drive but i cant access it on my own laptop i must mention it here that, the said external drive is working on other system, one more thing it doesn't seems to b a hardware or software issue coz power is available in all USB ports which shows that hardware is fine n external drive is ben picked up which shows that software is also working fine, but i fail to understand the missing connection. so sir i really appreciate any solution to this particular problem i m really in a mess sending u few pictures which might help thank u

Public Comments

1. i have seen usb ports fail, sometimes from mis-use (bent pins) sometimes jsut from unit failure, sometimes from driver faiure. you may want to consider contacting the manufacturer about this or taking it to a shop.
2. It does sound like a hardware failure. The USB drive is working fine on another system, hence it can't be broken. You've tried with a fresh install of Windows 7 and still no luck, so it can not be the Operating System. I understand all USB devices do not work on these ports. It is hardware. It could be they've given up on you. You could try to check the logs written by windows in the event manager, but I am not sure they'll tell you anything worthwhile.
3. check one your USB port is enable or disable
4. Easy fix Go to your device manager under plau and play devices, expand the section then plug in your device under the faulty usb port, as soon as you see a new device show up, right click it and uninstall. Reconnect your device into the usb post and it should re-install the driver again making it work. Do this with the other post also.
5. If you can’t find the right drivers manually I would recommend just getting a software program that can do it for you. There is a program I use which will find drivers for just about all hardware devices. The best part is it takes a snapshot of your system specifications and matches the right driver to go with it. Perform a free driver scan at: http://www.best-driver-updater.com/