Ah! Now we are getting somewhere.
The Windows 7 .iso file you download has to be burned to a DVD by using a
program that unpacks and burns at the same time. It appears that not all of
them do the job with the Windows 7 .iso file.
One that does is ImgBurn (FREE)
After the burn is completed it checks to be certain that the information on
the disk matches that contained within the downloaded file.
This disk WILL be bootable - assuming that you have an original Microsoft
download and not one from a warez site.
--
Richard Urban
Microsoft MVP
Windows Desktop Experience
"Manfred Heuer" <manfred_heuer@xxxxxx> wrote in message
news:u6csfAk%23JHA.1380@xxxxxx
Quote:
> Hello again!
>
> First I thank you all for your help!
>
> I must admit that the question has been held to common and was simplified
> too much.
> I just diskjockeyed a bit at home - first time, it seems, with a
> VISTA-DVD, and the result: it boots fine, although my computer is pretty
> akin to those at work and even a year older.
>
> And then I remembered why and when I was confused about:
>
> It was all about a Windows 7 DVD! I made that DVD at work (for I have no
> writer at home), tried the DVD in that same Computer, and it functioned.
> Then at home, I could not boot from that DVD: There was just the message:
>
> "CDBOOT: Cannot boot from CD Code 5".
>
> And with this Windows 7 DVD I made a test at work a bit later: only the
> Computers from last summer (on one of them I made the DVD) could boot from
> that DVD,
> and the Computers bought in 2006 did not - they generated just the same
> message "CDBOOT: ..." (all motherboards have an AMI-BIOS).
> All the Computer from 2008 have the same writer ..., perhaps the DVDs do
> not run in other DVD-Drives properly ... but that is just guessing ...
>
> Excuse my simplifying - I really thought, that DVDs did generally not boot
> on those machines. So my thinking does seem to be a bit weak.
>
>
> Greetings Manfred
>
>
>
> "Manfred Heuer" <manfred_heuer@xxxxxx> schrieb im Newsbeitrag
> news:ee2svpN#JHA.1376@xxxxxx Quote:
>> Hello!
>>
>> Why do older computers not boot from a DVD-Drive?
>>
>> Is it the DVD-Drive or the mainboard (with its BIOS or the onboard
>> controller)?
>>
>> Thanks Manfred
>