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Windows shows “USB device not recognised” when a scanner is connected through a cheap unpowered hub. What is the best first test?

Windows affiche « Périphérique USB non reconnu » lorsqu'un scanner est branché via un concentrateur bon marché non alimenté. Quel est le meilleur premier test ?

Answers
APlug it straight into a PC port, then try another cableLe brancher directement sur un port du PC, puis essayer un autre câble
BReinstall the operating system and all office applications from scratchRéinstaller le système d'exploitation et toutes les applications bureautiques à partir de zéro
CReplace the scanner immediatelyRemplacer immédiatement le scanner
DDisable all USB ports in the BIOSDésactiver tous les ports USB dans le BIOS
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