can not boot from CD .code 05what is this?MSI k8t-neo firs AMD 64 3000+2gig DDR 400ATI 9800 saffire

Can you boot from other CD/DVD's?Are you sure that your copy of the Win7 beta is good? Try re-downloading it and reburning it.If it's a torrent copy, this isn't unusual - so try it from the Microsoft site: Win7 beta download link - John

This has nothing to do with a bad iso or a bad download (well, it could, of course, but not necessarily).Each and every one of my dvds (dvd+rw) that I burned with a valid windows 7 copy (I checked the md5 sum) gave me this boot error code.But I also used those same dvds on a different computer, and they booted without any problem!Moreover, the dvd drive in my own computer doesn't appear to be broken, because it easily boots all kinds of other dvds/cds, like windows xp, slax (a linux live DVD), a FreeBSD dvd etc.Many, many people in many different forums experience this problem! It must be MS made or be some incompatibility with a specific chipset or BIOS version. Who knows...