Having problems with your Dell Dimension C521 PC Desktop ?

Usb issue usb keyboard and mouse do not function at the login screen in normal boot or safe mode. devices will work if i boot into the system with erd commander


Answers :

Do you have a ps/2 keyboard/mouse? Or a usb->ps/2 adapter. I'd say boot up normally and log in with the ps/2 keyboard/mouse. Then, from device manager, right click everything under USB and such and uninstall. Then right-click your computer name in the device tree and scan for changes.
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