Hi,

This is very primitive lock. You can unlock it with tweezers (just turn the cylindrical pivot inside the lock to another position). Alternatively you can open computer case, find the wire connected to the lock, and disconnect it from motherboard. (Usually kyboard lock uses 3-pin connector with two wires, but somtimes it's combined with power LED connector to make one 5-pins connector. In that case you can disconnect power LED also, so be carefull.)

Good luck, Igor M