Cannot boot from cd probably missing something

[abk4523]

I downloaded Knoppix 7.20 EN and burned it to cd but when I boot from the drive, the computer boots off my notebook's hdd. I disabled UEFI and manually selected the cd (usb) but still goes to Windows 7, which is on my drive. The md5 checked out and I tried 2 different cd drives. I tried an earlier version of Knoppix with the same results. Any ideas?

[Werner P. Schulz]

The md5 checked out and I tried 2 different cd drives

What do you mean by this? Doesn't you get a value by md5sum-test or is the value always wrong?

First check the md5sum of your download; second burn the DVD with lowest possible speed, close all the other programs and use only DVD of high quality.

[abk4523]

What do you mean by this? Doesn't you get a value by md5sum-test or is the value always wrong?

First check the md5sum of your download; second burn the DVD with lowest possible speed, close all the other programs and use only DVD of high quality.

I ran md5sum on a fedora drive and compared the value generated with the value in the md5 file from the download page, they are identical. I tried burning at a slower speed and am still unable to boot to knoppix. As for closing all programs, I do a cold boot, so nothing should be open.

[Werner P. Schulz]

Please test the burned DVD using the cheatcode

knoppix testcd

Wait some minutes until you get an error message or the boot process proceeds