USB - DVD Writer Problems

[alawadhi3000]

Problem:- USB Slots not working - DVD Writer won't eject

Note:- i have 4 USB Ports , 2 Connected directly on the motherboard, 2 conneted via wires to the motherboard

This all Started When i uninstalled my Router because i didn't know the password , my router software contain 2 parts (ethernet,USB), the ethernet installed succesfully , but the usb gives me access is denied

so i removed a USB Root Hub from device manager to install it again, it gives me same warning 'access is denied'

till now 2 ports are working and 2 aren't

i've removed a usb host controller to see if this cures the problem
but it hasn't , and same error if i tried to reinstall

now all USB not working , and i noticed that my DVD-Writer won't eject (i have a non-working cd-writer, and this DVD Writer)

Restarted my PC , and now the USB ports won't even get detected by system

my system specifation

P4 2.4GHz
512MB PC2700 DDR Ram
80 GB Seagate 380023A Harddisk
Matsonic(VIA) 9138D+ Motherboard
Samsung 8X DVD-Writer

any help well be appreciated

[alawadhi3000]

now USB controllers and root hubs get detected , but i can't install thier drivers ' access is denied'

[SuperSparks]

Try using the Add New Hardware wizard in the Control Panel. I've heard that it can sometimes get around the "Access is denied" message when trying to install drivers.

[alawadhi3000]

tried it, won't work

[SuperSparks]

Are you using an Administrator account to install the drivers?

And is it a Packard Bell PC by any chance?

[alawadhi3000]

yes i'am admin

and it's not a Packard Bell PC