I now have two Laptop units both same model (started with just one, around the beginning of October, Acer Travelmate 7530), that even though Windows states the drivers is loaded and device ready for use, such as USB Mouse, it does not work. When I check device manager, I have an Unknown listed for the device with Code 28. This happens with three different USB devices, ones I can plug into other units and they load with no issue. One device is USB Microsoft mouse.
I can not figure out why this is happening, especially after the second one starting doing it just last week apparently after Windows updates, and I do feel Windows Updates are related to the issue. I tried system restore on first Laptop along with coping USBport.inf and USBStor.* files from backups.I've tried uninstalling the USB universal USB device controller and rebooting but with same issue. Also I've already tried installing the Chipset drivers from Acer again with no change.
Any ideas anyone? from my online research, seems a lot have had this issue, some where able to resolve, others not so luck.