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Yesterday I upgraded a recently built Intel 4670 (ASUS Z87-A motherboard) system from Win 8 to Win 8.1. Upgrade went well and system performed fine afterward. Today I booted up and discovered the system could not detect USB ports, including my mouse. Troubleshooting says "USB Port Hub (xHC1) has a driver problem" and "SM Bus Controller doesn't have a driver". However, Windows unable to automatically fix the problem. I suspect I will not be alone in having this problem. Any thoughts? Thanks.
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Hi J TMansfield,
This issue can be caused when you don't have updated or latest drivers installed on the computer.
Please update the latest chipset drivers manually from the manufacturer:
Driver & Tools
http://www.asus.com/Motherboards/Z87A/#support
Please let us know the results after you have installed the latest drivers appropriately.
