Upgraded to Ubuntu 9.10 and Windows cannot be booted.

I don't dual boot with windows, but You may find a solution here:
https://help.ubuntu.com/community/Grub2

I'd add that it appears you're booting a Dell diagnostics partition (or something similar) instead of your regular Windows partition. Normally that partition is marked hidden so that it won't show up in Windows (but will in Linux).

I have no idea what that means.

I have no idea what that means.

Your hard disk is divided up into pieces called partitions, and these different partitions can have different things on them. In Windows they show up as different drives, even though they're actually on the same physical disk. Normally, for a dual boot setup, Windows would be on one partition, and Linux would be on one or more others (often one for files and one for swap space).

Dell and some other manufacturers sometimes put an extra hidden partition on the disk with some software for diagnostics or to restore the system to the way it came from the factory -- and it sounds like you were booting from this (and seeing their diagnostic menu) instead of your actual Vista partition. Because it's marked as hidden, Windows doesn't normally show you that it's there, but grub and Linux can see it just like any other disk partition.

Try this from a terminal, and show us the results (command is exactly as below, including the question mark):

sudo fdisk -l /dev/sd?

That's a lower-case L after the hyphen. That should show what partitions you have on your hard disks (one of them should have your Vista install on it). Then we can worry about why it's not in your grub menu.

Disk /dev/sda: 160.0 GB, 160000000000 bytes
255 heads, 63 sectors/track, 19452 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
I did get Windows on GRUB menu but it just takes me to that diagnostics page.
Here's what I get when I run the command you told me to run.

Disk identifier: 0xe0000000

   Device Boot Start End Blocks Id System
/dev/sda1 1 5 40131 6 FAT16
/dev/sda2 6 1311 10485760 7 HPFS/NTFS
/dev/sda3 * 1312 14336 104623312+ 7 HPFS/NTFS
/dev/sda4 14337 19452 41094270 5 Extended
/dev/sda5 14337 19236 39359218+ 83 Linux
/dev/sda6 19237 19452 1734988+ 82 Linux swap / Solaris

Disk /dev/sdf: 1023 MB, 1023933952 bytes
124 heads, 62 sectors/track, 260 cylinders
Units = cylinders of 7688 * 512 = 3936256 bytes
Disk identifier: 0x20202020

   Device Boot Start End Blocks Id System
/dev/sdf1 1 21 80293+ 0 Empty
Partition 1 has different physical/logical beginnings (non-Linux?):
     phys=(0, 1, 1) logical=(0, 1, 2)
Partition 1 has different physical/logical endings:
     phys=(9, 254, 63) logical=(20, 111, 8)
Partition 1 does not end on cylinder boundary.
/dev/sdf2 21 261 919610+ b W95 FAT32
Partition 2 has different physical/logical beginnings (non-Linux?):
     phys=(10, 0, 1) logical=(20, 111, 9)
Partition 2 has different physical/logical endings:
     phys=(124, 123, 62) logical=(260, 15, 61)

Disk /dev/sda: 160.0 GB, 160000000000 bytes
255 heads, 63 sectors/track, 19452 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
I did get Windows on GRUB menu but it just takes me to that diagnostics page.
Here's what I get when I run the command you told me to run.

Disk identifier: 0xe0000000

   Device Boot Start End Blocks Id System
/dev/sda1 1 5 40131 6 FAT16
/dev/sda2 6 1311 10485760 7 HPFS/NTFS
/dev/sda3 * 1312 14336 104623312+ 7 HPFS/NTFS
/dev/sda4 14337 19452 41094270 5 Extended
/dev/sda5 14337 19236 39359218+ 83 Linux
/dev/sda6 19237 19452 1734988+ 82 Linux swap / Solaris

Disk /dev/sdf: 1023 MB, 1023933952 bytes
124 heads, 62 sectors/track, 260 cylinders
Units = cylinders of 7688 * 512 = 3936256 bytes
Disk identifier: 0x20202020

   Device Boot Start End Blocks Id System
/dev/sdf1 1 21 80293+ 0 Empty
Partition 1 has different physical/logical beginnings (non-Linux?):
     phys=(0, 1, 1) logical=(0, 1, 2)
Partition 1 has different physical/logical endings:
     phys=(9, 254, 63) logical=(20, 111, 8)
Partition 1 does not end on cylinder boundary.
/dev/sdf2 21 261 919610+ b W95 FAT32
Partition 2 has different physical/logical beginnings (non-Linux?):
     phys=(10, 0, 1) logical=(20, 111, 9)
Partition 2 has different physical/logical endings:
     phys=(124, 123, 62) logical=(260, 15, 61)

I don't know the commands to edit "/etc/grub.d/40_Custom". I try to use "pico" but it keeps making a new file everytime.

If you're logged into Gnome, you can start GEdit using the following command in a terminal window:

sudo gedit /etc/grub.d/40_Custom

This will start GEdit as root and open that file.

I'm still confused, I've never logged into Gnome before, and when I tried manually opening the file its read only and I have to hit "save as."

Ok... when you start up Ubuntu, it loads for a while then gives you a screen where you pick your user name and enter your password, then after that you get to your desktop. That's what I mean by logging into Gnome -- Gnome is the GUI (desktop and so on) that Ubuntu uses.

So anyway, if you've logged in like that, there are two ways to get a terminal -- you can open a terminal window, for example by choosing "Terminal" from the menu at the top of the screen, or you can switch to one of the virtual terminals and log in there (outside of the GUI). I'm guessing you've been doing the first one, opening "Terminal" from the menu, so that you get a terminal in a window. If that's the case, you can just run:

sudo gedit /etc/grub.d/40_custom

..to open and edit the file. Note there are no capital letters (sorry -- in the previous message I accidentally capitalized "custom" since you had in your message -- it should be lower case). The file should have been installed with Grub 2, so it should be there.

Thanks D Becker, that solved my question.