Thought that I installed the correct chipset for the ACER mentioned in the subject line. After installing the chipset the keyboard and mouse did not work. Using Windows XP home edition. I downloaded the chipset from the ACER web page. Since I reinstalled Windows the mouse and keyboard are working fine. Here is what has that question mark in the device manager. Network Controller Other PCI bridge devices PCI Device SM Bus Controller Unknown Device Video Controller (VGA Compatible) I have the correct drivers for the Video Controller and the Audio. I was told to install the chipset first before any of the drivers. The first picture is the ACER Driver web page address.