Shut down computer; everything is working fine. Press the power button to boot it up the next morning; Keyboard not present error, during system POST. Computer boots just fine when I change out the keyboard for a PS/2 KB, but when Windows starts, I got no USB devices at all. I KB my way to the Device Manager and it shows all of my USB devices attached, but as Unknown Devices... can't get them to reinstall by updating drivers. WTF?
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Re: USB Devices not recognized
Go into bios by pressing F2 on boot and make sure that usb support is enabled. If it is then boot and go to device manager and uninstall the usb devices, then try to reinstall. Instead of just updating the drivers.
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During the boot process you will see on the screen to press a certain key to enter setup Press and hold that key during the boot up process to enter BIOS you can load failsafe defaultsor load optimized defaults ,press escape then press f10 to save to cmos to restart or During the boot process tap thef8 button three times this will boot into safe mode where the only things working will be your mouse and keyboard enabling you to attempt to repair your computer Also you might try Turn Off the computer, now as soon as you hit the power button, keep on holding "Alt" key & keep on tapping "F10 key,ie: Alt+F10, it will open the recovery console ,select full factory restore and follow on screen instruction. (Note:this will erase all datas on the computer) hope this helps
Unplug the usb receiver as well as all other usb devices plugged in. Unplug your desktop from the power outlet. While unplugged, press and hold the power button for around 10 seconds to drain the power. Plug the power back but not the usb devices. See if it now boots up.
I love using Gigabyte boards in my own Home Theater PCs, so I run across this problem sometimes when I'm setting them up for the first time with a USB keyboard.
Pretty sure the problem you're having is the same--the BIOS isn't set to 'recognize' USB keyboards by default, so try the following:
Turn it off, and connect an older PS/2 style connecting KB to it;
Turn it back on, enter the BIOS, and find the settings page with 'USB Keyboard' in it;
Change that setting to BIOS rather than SYSTEM, so next time you boot, it will 'see' your USB KB. Plug in your USB KB before rebooting, then save the settings and reboot the PC again.
You can leave the old PS/2 KB plugged in to make sure you can change things, but try your USB keyboard out as well. You should be able to control BIOS settings upon reboot.
Hopefully this was all you needed. If it persists, be aware that some Gigabyte mobos have had BIOS issues galore (eBay is full of Gigabyte BIOS chips).
Considering that if the USB is fine and and working systems, here is simple
solution! Simply UNPLUG YOUR COMPUTER FROM THE POWER SUPPLY. Yes that?s it! Note
that this does not mean just turning off your computer because modern
computers don?t really turn off when you press the power button as the
motherboard still gets power.
First to explain, the motherboard is where all of hardware of the
computer is connected to, including the USB ports. Sometimes the
motherboard needs to be ?rebooted? also because something can go wrong,
i.e. all your USB ports suddenly stop working. The small microprocessor
on the motherboard will reload the drivers and your USB ports should be
back to recognizing all devices!
So, first turn off your computer using Shut Down or pressing the power
button and then UNPLUG it from the wall outlet. Remove the battery and
press and hold down the Power Button of your laptop for a few seconds.
Let it sit for about a minute and then plug it back in.
Hope this helps someone fix that ?USB device not recognized? Windows
Otherwise if the USB is faulty you may claim the warranty as the USB Pendrives are usually under 10 months warranty cover. CreativeTECH
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Simply UNPLUG YOUR COMPUTER FROM THE POWER SUPPLY. Yes
that’s it! Note that this does not mean just turning off your computer because
modern computers don’t really turn off when you press the power button as the
motherboard still gets power.
The motherboard is where all of hardware of the computer
is connected to, including the USB ports. Sometimes the motherboard needs to be
“rebooted” also because something can go wrong, i.e. all your USB ports
suddenly stop working. The small microprocessor on the motherboard will reload
the drivers and your USB ports should be back to recognizing all devices!
So first turn off your computer using Shut Down or pressing the power button
and then UNPLUG it from the wall outlet. Let it sit for about a minute and then
plug it back in. (VOILA)