I messed up everything in TCL and it didn't work well.
I had to format the hard drive and reinstall it.
1. Burn a CD from dban-2.3.0_i586.iso using ImgBurn.
Choose "Write image file to disc".
If laptop, close disc tray manually when it opened.
OK.
(2. Change Boot Order to boot from the CD.)
3. Put the CD into the PC and dban will delete
all data on the hard drive.
Enter.
Wait for a few min and "Darik's Boot and Nuke 2.3.0" appears.
(ATA Disk Seagate ST94019A 5.11 37GiB(40GB) 3KW58XMN)
(Pentium M)
Press space bar for [wipe].
F10 to start.
It took more than 2 hours to do it.
4. Reinstall TCL6.4. Use tc-install.tcz.
(5. Set BIOS back to Default using f9 and f10.)