Hi guys, I've been flying for years and never had this problem until this morning. When trying to run FS2004 I get the 'Please insert FS2004 Disk 4, select OK and restart application' error. BUT: -The CD (disk 4 of FS2004, legally bought) is in the DVD-ROM (also, when I use right click+explore it opens and shows all files no problem meaning CD is not damaged or scratched etc)-DVD-ROM works fine, all other CDs or DVDs open and play ok-No new aircraft/sceneries/files installed since last flight yesterday-Kaspersky anti-virus running as usual, never caused problems with FS9 or FSX before-FSX opens and flies normally without issues Any ideas what it could be? I have a large number of add-on aircraft and sceneries that I've been using for a long time and I don't really feel like re-installing FS2004 form scratch again! Thanks in advance,Chris