Hello everyone, this is my first post and I would greatly appreciate some help! The scenario, girlfriends PC dies, MB blown so... New MB, CPU, PSU and case. Only HDD, optical drives and memory retained. MB is an ECS RS400-A. HDD on IDE primary channel, optical drives on secondary. Problem: Can't install XP for some reason, disk doesn't autorun and obviously cannot run XP from the MS-DOS prompt. This is further confused by the fact that I went back and ran an old copy of Windows 98 SE (creating CABS files on the C drive and running setup from there). This works fine, so the CD-rom works in DOS, on the generic drivers used on the boot disk... However it then refuses to show an optical drive in Windows, which obviously is preventing me upgrading the OS to XP. I realise I am probably missing something incredibly obvious but I'm slowly going crazy with it!