Hi, I have an Advent 3511 and tried replacing the m'board but it wont boot up. It recognises the HD but keeps saying the config.sys file is missing or corrupt and suggests the recovery disc which wants to wipe all the files/programs. The original m'board is now back in and it works but just as slow as before! Any ideas on how to allow a new m'board to be installed whilst keeping the HD intact and not replacing Windows.?