Who is your least favorite/hated PC manufacturer?

For me it is Acer. I had absolute nightmares with my Acer laptop.

The specs looked great on paper- 3.1ghz 3rd Gen Inter i7, 8GB Ram, 750GB space etc but man, the performance degraded dramatically overtime. It suffered from a awful build quality, rubbish trackpad, severe overheating while playing games and usb ports kept failing. I have personally vowed to never buy Acer products again.

How about yours?