Hi folks, After having tried several days to install and run FC5_64 on a new AMD64 box without a breakthrough later I discovered that the problem may come from the onboard LAN. Motherboard - ASUS A8N-VM with - built-in PCI graphic card nVidia GeLForce 6100 GPU - onboard LAN. 10/100 Mb MAC with Realtek ALC8201CL I made following tests 1) Removed the PCI-E graphic card (Gigabyte nVidia GeForce 6600, GV-NX66256DP2) and disabled the onboard LAN on BIOS. Connected the LCD monitor to the onboard graphic card. Started FC5_64 with GUI and login as KDE as "root" and then as user". Both worked great without problem. I tried opening and closing applications without screen hung. Login Gnome as root/user with the same situation, no screen hanging 2) Same configure as point 1) above but installed a NIC, Realtek, on PCI slot. Problem came immediately with screen hanging after working a short while. 3) Tested the box as point 1) configured with the PCI-E graphic card installed. Although the screen hung finally the box worked for a long time only without connection to Internet. 4) Tested Koppix Live CD 4.0.2/DSL/Puppy Linux on this box with onboard LAN on. All of them worked without problem only can't find the right driver for the onboard LAN to setup broadband connection. Now I don't know why FC5_64 happened in this way, completely cut off from outside world. Advice and suggestion would be appreciated. TIA B.R. satimis