Lose USB connections after reboot

[Chredge]

Hi All,

 

Hope someone can help me here.

 

All of a sudden all 6 USB connections on my desktop XP had stopped working. The computer itself is fine and boots up without a problem it's just so damn annoying that my USB keyboard and mouse don't work now because of this. I've tried uninstalling the USB drivers from Device Manager and re-booting the PC in the hope that Windows may re-install these again on startup but this doesn't work.

 

I gave up and bought a PCI card with 4 USB connections in the back. I installed the card and this worked fine (while the machine was switched on...). The next day I switched on the PC and the USB connections had stopped working again. I removed the USB PCI card from the PC before re-installing this again and rebooting. When the machine started the card was working fine again.

 

I am now too scared to switch the PC off incase it 'forgets' about my USB PCI card and I have to go through the whole process again.

 

How would I resolve this issue?

 

Hope you can help,

 

Chredge.

[Jelly Bean]

Hello there.

 

Could ypu pop in a normal keyboard and mouse and then enter BIOS and see if USB support is enabled for a USB keyboard and mouse??

 

Also downloading your computers latest chipset may help the USB issue,

[Tootech]

Also, I would like to know if you have any other USB devices plugged in - such as a printer.

 

If so, remove them all except keyboard and mouse - reboot and see if kb and mouse work.

 

If that makes no odds, can you hook up a USB printer and see if that works.

 

Thinking is that keyboard and mouse require power from the mainboard to function, printer does not, it could help narrow down the problem.

[Dalo Harkin]

USB devices draw power requirements from a specific rail on the PSU, if you have too many it cant distribute the power properly and the MOBO may be shutting the ports down to compensate