Since the construction of the system two days ago, only 2 USB ports have worked (those with the PS / 2). The other two pairs (including USB 3.0) does not seem to work at all, even during boot, so I tend to believe that this is not an operating system problem (I tested kb, mouse, memory cards, etc .) I updated all motherboard drivers disk included, and also specifically downloaded and updated USB 3.0 drivers, but did nothing. Front USB ports on my system, connected to the head USB4 seem to be working fine (tried to disconnect and try again, if there was any conflict rare, but the building in which still does not work). Please help me thank you.
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