On the dell website where i am downloading drivers it has a chipset driver that says it is installing plug and play drivers. it says successfully installed but still [email protected] work.
I have looked at services plug and play is automatic. I have service pack 2 will try download service pack 3 now.
utdevadm -e -s usb (should be a hash sign space utdevadm)
Now lets get rid of any conflicting devices
are you keyboard and mouse USB or PS2 assumming PS2 as you say no USB is working?
download USBdeview from here(to another machine and transfer across by floppy or cd or network) run it and uninstall ALL usb devices (except keyboard and mouse if using USB KB/ Mouse).
Reboot the machine and let windows find new hardware and install when you plug in a usb device.
It seems to be any plug and play device not just usb for example its not detecting wireless card. i don't know if relevant but when i went to services. human interface device access is disabled and i cannot set to automatic