I have a computer from a fellow co-worker. It is a Dell XPS 410 running Windows XP Media Center. The guys wife bought, installed, and run System Mechanic from a big box store. Now the USB ports do not work. There are not any PS/2 ports for the old style mouse or keyboard. That being said, there is no use of the mouse or keyboard. When you go into the BIOS settings or system setup, the keyboard works. When the OS loads, it does not. When you plug a mouse or keyboard into a USB port, it does recognize it and attempts to install the drivers, but then gives and error message and informs you that the device may be inoperable. I have gone into the system settings and made sure the USB controller was turned on and all the USB's are enable. I have taken the hdd out and removed all of the System Mechanic, System Shield, and Iolo files from the drive. I have attempted to boot from that hdd on another computer using a dock, but it gives a BSOD and restarts. I was kind of leery of doing that any ways. I can only assume that the software she used give her the option to update all of the drivers on the system and has in turn created a conflict with the usb drivers. At any rate, I have reached the point where I am unsure what to do next. Any help in getting this computer back in action would be greatly appreciated. Thanks.