For my edification, please help identify why this happened.
The PC is an HP, using Win 7, 8Gb RAM, all Windows updates current. Norton AV up to date.
Today, I couldn't get a single USB 2.0 slot to work. Card reader, too. I have a PCI slot for a USB 3.0. That did work.
When I checked the Device manager for the USB connections, several of them said that Windows could not load the drivers. I checked for updating the driver software, but it said it was up-to-date.
I did a system restore point, roughly a week ago, and now those 2.0 ports are working again.
What would cause this to happen? Thanks.

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