Hello, I had a problem with a virus so I reinstalled win XP Pro. Then before installing or running any programs I ran AVG Virus software and remove the virus. Then installed the basic peripheral software and everything was working great. I shut down the PC and remove the ATI 7500 Video card to look for the SN#. Next I replaced the video card and booted the PC. That’s when I got this error – Windows could not start because the following file is missing or corrupt: <windows root>\sestem32\ntoskrnl.exe. Please reinstall a copy of the above file. Using a readntfs boot disk I got to the A: prompt. When I tried to go to the C: drive from the A: prompt I got this message: Drive C: not responding out of internal memory. I tried using the six floppy disk windows XP setup but it would always stop (freeze) on the third or forth floppy disk. I tried one more time to get to the C: drive from the A: prompt, got the same message: Drive C: not responding out of internal memory. So I thought to try and see if the D: drive is there and got the same message D: drive not responding out of internal memory. So if the C: prompt is not responding I can’t copy the missing ntoskrnl.exe to the C: drive 20 gb Maxtor alone on the IDE 1 slot for the OS. Drive D: is on the IDE 2 slot And I have two other drives on PCI IDE card I hope this is enough and not too much, thanks.