Vista USB drivers not working

I'm running Vista Home Premium on my laptop and my USB port drivers are failing to install. The Standard Universal/Enhanced PCI to USB host controller is missing.

All USB ports don't work, and device manager has yellow exclamation marks on the USBs.

Please help?

Vista is trying to tell you that using USB drives can impose security risks. And it's disabling the ports by default. It's by design. There's no possibility to disable that behaviour in Home Premium, you'd need Business or Ultimate for that.