Live CD doesn't change settings, so I can't explain your problem.
Just tried live cd for the first time. I noticed when knoppix was booting it did not recognise the graphics card ( ATI Radeon X1600 Pro). I assume it used the embedded Intel graphics, or it's own (not sure). While I was using Knoppix it froze up and I had to restart the computer. I took knoppix out before I restarted to boot into windows. Now the ati card will not work in my computer. The cp will not boot at all with the video card in, not even a bios screen. I have to take the ati card out and let windows boot with the embedded drivers (intel extreme 3). I can't install ati drivers without the card in. Did Knoppix replace my drivers? What options do I have?
Intel Pentium 4
Duo 2.80GHz
533MHz
Windows XP MCE
Live CD doesn't change settings, so I can't explain your problem.

Windows XP, Vista, 8.1, Linux Knoppix, Office XP, (6 CDS)
$10.00
KNOPPIX 9.1 Linux Install & Live DVD 32bit & 64bit
$19.99
KNOPPIX USB DVD OS , BEST OF ALL HIGHLY RECOMENDED
$11.99
Knoppix Live GNU Linux System 9.1 on Bootable CD / DVD / USB Flash Drive
$5.99
Knoppix Linux Bootable OS v8.6 "Original Live Operating System" 16G USB Stick
$20.85
$8.00
VINTAGE SOFTWARE | KNOPPIX STD 0.1 (SECURITY TOOLS DISTRIBUTION)
$7.57
Knoppix Linux Bootable OS v8.6 "Original Live Operating System" 32G USB Stick
$21.42
$7.00
Knoppix 5.0.1 ULTRA RARE Linux DVD - Linux Pro Extra August 2006
$33.98