so this is weird. I connected a different keyboard to my PC (not necessarily a new one but it works completely fine) but, when the keyboard is connected via usb (does not matter which usb, just any usb slot) the computer wont boot and it sticks on the welcome screen of the motherboard.

There is a set of diodes on the motherboard which keep glowing just after the computer is turned on (they usually stop glowing after 5 seconds as the computer starts booting)

If I unplug the keyboard then I can boot without troubles. After boot I hook up the keyboard and keep using it as normal.

Any idea what and where is the problem?