I recently bought an asus m3n-ht motherboard to replace my old defective one. I installed the mother board, everything turned on. My keyboard and mouse worked int he bios screen, but as soon as I got into Windows Xp, the keyboard and mouse quit working. I tried moving my usb around to other usb slots, but it still doesn't work. Has anyone experiened this before.
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Have you tried updating your motherboard's BIOS ? also were your mouse and keyboard working fine before this motherboard ?
Try other USB devices and check if PS/2 keyboard/mouse works if you have one.