Hello Everyone, I got this tiny issue on my Dell XPS, I run a dual boot Windows Vista and Ubuntu 8.04.2 on this laptop it has been working since several days before but today I found out that I am not able to boot Vista anymore I got the Error 13: Invalid or Unsupported Executable Format message everytime I try to boot, I actually did a search and I was able to find some info about it <a href="http://ubuntuforums.org/showthread.php?t=282545">here</a> and I tried changing the menu.lst but without any change or progress, still says Error 13, I wonder if anyone could guide me resolving this. TIA here's my menu.lst: # menu.lst - See: grub(8), info grub, update-grub(8) # grub-install(8), grub-floppy(8), # grub-md5-crypt, /usr/share/doc/grub # and /usr/share/doc/grub-doc/. ## default num # Set the default entry to the entry number NUM. Numbering starts from 0, and # the entry number 0 is the default if the command is not used. # # You can specify 'saved' instead of a number. In this case, the default entry # is the entry saved with the command 'savedefault'. # WARNING: If you are using dmraid do not use 'savedefault' or your # array will desync and will not let you boot your system. default 0 ## timeout sec # Set a timeout, in SEC seconds, before automatically booting the default entry # (normally the first entry defined). timeout 10 ## hiddenmenu # Hides the menu by default (press ESC to see the menu) #hiddenmenu # Pretty colours #color cyan/blue white/blue ## password ['--md5'] passwd # If used in the first section of a menu file, disable all interactive editing # control (menu entry editor and command-line) and entries protected by the # command 'lock' # e.g. password topsecret # password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/ # password topsecret # # examples # # title Windows 95/98/NT/2000 # root (hd0,0) # makeactive # chainloader +1 # # title Linux # root (hd0,1) # kernel /vmlinuz root=/dev/hda2 ro # # # Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST ### BEGIN AUTOMAGIC KERNELS LIST ## lines between the AUTOMAGIC KERNELS LIST markers will be modified ## by the debian update-grub script except for the default options below ## DO NOT UNCOMMENT THEM, Just edit them to your needs ## ## Start Default Options ## ## default kernel options ## default kernel options for automagic boot options ## If you want special options for specific kernels use kopt_x_y_z ## where x.y.z is kernel version. Minor versions can be omitted. ## e.g. kopt=root=/dev/hda1 ro ## kopt_2_6_8=root=/dev/hdc1 ro ## kopt_2_6_8_2_686=root=/dev/hdc2 ro # kopt=root=UUID=72888393-f306-4e25-94cf-fa6737d12111 ro ## Setup crashdump menu entries ## e.g. crashdump=1 # crashdump=0 ## default grub root device ## e.g. groot=(hd0,0) # groot=(hd0,2) ## should update-grub create alternative automagic boot options ## e.g. alternative=true ## alternative=false # alternative=true ## should update-grub lock alternative automagic boot options ## e.g. lockalternative=true ## lockalternative=false # lockalternative=false ## additional options to use with the default boot option, but not with the ## alternatives ## e.g. defoptions=vga=791 resume=/dev/hda5 # defoptions=quiet splash ## should update-grub lock old automagic boot options ## e.g. lockold=false ## lockold=true # lockold=false ## Xen hypervisor options to use with the default Xen boot option # xenhopt= ## Xen Linux kernel options to use with the default Xen boot option # xenkopt=console=tty0 ## altoption boot targets option ## multiple altoptions lines are allowed ## e.g. altoptions=(extra menu suffix) extra boot options ## altoptions=(recovery) single # altoptions=(recovery mode) single ## controls how many kernels should be put into the menu.lst ## only counts the first occurence of a kernel, not the ## alternative kernel options ## e.g. howmany=all ## howmany=7 # howmany=all ## should update-grub create memtest86 boot option ## e.g. memtest86=true ## memtest86=false # memtest86=true ## should update-grub adjust the value of the default booted system ## can be true or false # updatedefaultentry=false ## should update-grub add savedefault to the default options ## can be true or false # savedefault=false ## ## End Default Options ## title Ubuntu 8.04.2, kernel 2.6.24-23-generic root (hd0,2) kernel /boot/vmlinuz-2.6.24-23-generic root=UUID=72888393-f306-4e25-94cf-fa6737d12111 ro quiet splash initrd /boot/initrd.img-2.6.24-23-generic quiet title Ubuntu 8.04.2, kernel 2.6.24-23-generic (recovery mode) root (hd0,2) kernel /boot/vmlinuz-2.6.24-23-generic root=UUID=72888393-f306-4e25-94cf-fa6737d12111 ro single initrd /boot/initrd.img-2.6.24-23-generic #title Ubuntu 8.04.2, kernel 2.6.24-19-generic #root (hd0,2) #kernel /boot/vmlinuz-2.6.24-19-generic root=UUID=72888393-f306-4e25-94cf-fa6737d12111 ro quiet splash #initrd /boot/initrd.img-2.6.24-19-generic #quiet #title Ubuntu 8.04.2, kernel 2.6.24-19-generic (recovery mode) #root (hd0,2) #kernel /boot/vmlinuz-2.6.24-19-generic root=UUID=72888393-f306-4e25-94cf-fa6737d12111 ro single #initrd /boot/initrd.img-2.6.24-19-generic title Ubuntu 8.04.2, memtest86+ root (hd0,2) kernel /boot/memtest86+.bin quiet ### END DEBIAN AUTOMAGIC KERNELS LIST # This is a divider, added to separate the menu items below from the Debian # ones. title Other operating systems: root # This entry automatically added by the Debian installer for a non-linux OS # on /dev/sda1 #title Windows Vista/Longhorn (loader) #root (hd0,0) #savedefault #makeactive #chainloader +1 title Windows Vista root (hd0,0) (I actually changed this lines to hd1,0 - hd0,1 etc without any progress) savedefault makeactive map (hd0) (hd1) map (hd1) (hd0) chainloader +1 -- "It is human nature to think wisely and act in an absurd fashion." 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