On December 3, 2004, the supervision company called told me that his PC is run very slow. It is a brand of Lenovo. ), Pre-installed Win2000 system. After booting, I found that the desktop couldn't come out. So press F8 to start with "last correct configuration". The desktop can come out, but it is not possible to run, and the speed is very slow. First, it is suspected to be a virus, because the hard disk data has been backed up. So the partition reloading system. But the phenomenon is still. According to the principle of "soft and hard". Exclude software issues. Disconnect the chassis and find that there is more dust! So remove all hardware, after cleaning, reload the machine, the system is running a little more, but it is still a dead. After checking the hardware, I found that the CPU temperature is normal, but the main board North Bridge chip heat sink is very hot. After strengthening heat dissipation, the problem cannot be resolved. On December 4, 2004, another 845G motherboard (without a network card), received a local area network to access the Internet, but the direct coamental broadband and could not be online. At first, I suspect it is a network card problem, I changed the N block or not. IRQ allocation is no problem, and finally found the green signal light of the NIC when the pick-up domain network is on, but when the ADSL device is connected, the network card signal light is not bright, but it will be blurred (the offline area network is not a line), relying on the network cable, there is a problem. The problem is solved after the network cable. The PC speed is much more faster than before. But occasionally automatically power out of 5 seconds after booting. Unplug the motherboard jumper to short the power jumper directly, start normal, rely, the chassis power button has problems! Disassemble the chassis found that the button spring has been rusted, but the spring of the outer button is in good condition. It's good to get this problem, you have to go back to the system, the problem is coming, when the web is opened, it is displayed incomplete. The speed is still problematic. 128M memory, the installation of Win2000 should not be a problem, after all, there is no big software. It is no longer, with a Win98 normal PC hard disk Ghost (to die). Fast! Why is WIN2000? Some slow? Summary is three: 1. Hard disk 5400 turn is still slow. 2.128 The memory is still small. 3. The things of Lenovo are still different.