I've just changed my board and processor and put the old one in my brothers old Pentium III system. He's now got an Athlon 2600+ with Leadtek board. The Operating system and all old Hard-drives have been kept. The problem is that Windows is not starting. All the hardware is in right and BIOS is set right, all drives are found and listed, but I keep getting the screen telling me that there is a problem with windows starting, any offers as to a solution??

hi mbobo

Do you get a specific error message? If you do can you post it here.

Because you are putting in a hard drive that was working in another system, it will still have the settings for the old motherboard / processor e.t.c

So I would recommend you format the hard drive and install windows while running on the new board.