I've searched for hours, reading everything that seemed relevant to dual boot problems, on 4 different linux forums, but nothing posted has helped in this case.

I wanted to set up a dual boot XP-Pro/PCLOS system (I've done this lots of times with XP, 98, and Mandrake/Gentoo). I Did a clean XP istall, rebooted to check it out- all was fine. Then installed PCLOS- all went fine, and I rebooted to it to check it out. No problems.

Then tried to boot into XP, and after a normal boot screen, I get this, on a blue screen:

autochk program not found skipping autochk

Then I get, on a BSOD:

STOP: c00021a {Fatal System Error}
The session manager intialization system process terminated unexpectedly with a status of 0xc0000o03a
(0x00000000 0x00000000)
The system has been shutdown
-----------------------------------------------------------------------
Here's my fstab, and lilo.

## livecd-install Automatically added by livecd-install

none /proc proc defaults 0 0
none /dev devfs defaults 0 0

# fd: H1440
none /mnt/floppy0 supermount dev=/dev/fd0,fs=udf:iso9660,user,exec,rw,noauto,--,iocharset=iso8859-1,codepage=850,umask=0 0 0

# /dev/hda1, size=12289662, type=27: Hidden WIN95 OSR2 32-bit FAT (primary)
/dev/hda1 /mnt/win_c vfat user,exec,rw,auto,iocharset=iso8859-1,codepage=850,umask=0 0 0

# /dev/hda5, size=192717, type=1155: Journalised FS: ext3 (extended)
/dev/hda5 /mnt/hda5 ext3 user,exec,rw,auto 0 0

# /dev/hda6, size=1911672, type=130: Linux swap (extended)
/dev/hda6 swap swap defaults 0 0

# /dev/hda7, size=15438402, type=387: Journalised FS: ReiserFS (extended)
/dev/hda7 / reiserfs notail,noatime,notail,noatime 0 0

# /dev/hda8, size=4128642, type=387: Journalised FS: ReiserFS (extended)
/dev/hda8 /home reiserfs notail,noatime,notail,noatime 0 0

# cdrom: CD-ROM 50X L
none /mnt/cdrom0 supermount dev=/dev/hdc,fs=udf:iso9660,user,exec,ro,noauto,--,iocharset=iso8859-1,codepage=850,umask=0,nohide 0 0
-----------------------------------------------------------------

# File generated by DrakX/drakboot
# WARNING: do not forget to run lilo after modifying this file

boot=/dev/hda
map=/boot/map
default="pclinuxos"
keytable=/boot/livecd.klt
prompt
nowarn
timeout=100
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz-2.4.22-32tex
label="pclinuxos"
root=/dev/hda7
initrd=/boot/initrd-2.4.22-32tex.img
append="devfs=mount acpi=ht splash=silent"
vga=788
read-only

other=/dev/hda1
label="windows"
-----------------------------------------------------------------
Anybody have any ideas? The XP install was checked first, and booted fine before the PCLOS install. I'd really hate to have to go back to mandrake 10- I know that works with XP, but I really prefer PCLOS, and need XP on this box for when the grandkids come.

Thanks,
wrc1944

Sorry- did some more googling, and found out this happens on other Linux OS's too. Somehow, my C: XP drive got "hidden" during the PCLOS install. I went into cfdisk as root, and it showed hda1 as indeed hidden, so I changed the type of hda1 to 0B, rebooted, and all was fixed. No data loss, and XP now boots OK, as does PCLOS.

Hope this helps anyone else running into this problem. BTW, I installed with the original P7, not the P7a disk.

Sorry if I wasted anyone's time,
wrc1944