"MSI pci bridge device" is an inadequate hardware description. We cannot help based on the vague description.
Folks, you should always include your pc brand and model (for OEM mb's.) and/or the motherboard brand and model (if it's a retail mb.) with your requests.
Then say if it's used in a desktop or laptop pc along with a description of the actual hardware device that you need a driver for.
I don't believe that I've ever seen a "MSI pci bridge" on any manufacturers driver page so you will need to explain what exactly this device is.