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Since I don't have that kind of expertise, should I just give up?

So, what should I do now?

http://paste.ubuntu.com/5695578/

Since there were folders named efi and syslinux on the USB, I just made a test.

And, I have figured out that the problem is with the bootloader.
While the OS is fully installed on the USB and...

Done that, still have that problem...

And something that I have noticed:
In sdc12, there are two folders named efi and syslinux.
On my BIOS, "EFI Mode" is off. And my bootloader is grub. But it...

According to this, I tried to boot while the USB is unplugged.
I have copied sdc8, sdc12, sdc5, sdc3, sdc1. in the exact order, and leaving the necessary unallocated space in between. I used the...

According to your advice, I manually created the two biggest partitions (sdc3 and sdc1 in screenshot) and copied them with dd.
This time, grub recognized the OS. But when I opened it, the operating...

I ran this:

sudo dd if=/dev/sdc of=dev/sda8
in which sdc is my USB and sda8 is the target hard drive partition...

Next I updated GRUB. but it didn't recognized the OS :(

By the way, I...

Hey, this is a little bit out of ubuntu, concerning another OS installation over ubuntu, but there's nowhere else to ask this, so here goes.

Installed Chromium OS Vanilla on a USB as a Live OS....

The Intel/PC partitioning rule is, you can have as many logical partitions as you like if they are end to end. An extended partition is the placeholder for all of your logical partitions. So when you...

Then that would be #1 on my to-do-list, while my computer's now working. Thanks a lot!

Ok just borrowed the neighbors usb (should have thought of that earlier :D), installed ubuntu live, then boot-repair and now it's working. Boot-repair summary: http://paste.ubuntu.com/1613807/
...

kexec: command not found.

When I get to "chroot /mnt" it says
chroot: failed to run command '/bin/bash': Exec command error.

That's what I exactly see at the moment. Still insmod normal won't work.

Fixing the wrong prefix string, now insmod normal replies:
error: unknown filesystem.
It is ext4. Any ideas?

Ok this is how it went:

grub rescue> set root=(hd0,msdos7),
grub rescue> set prefix=(hd0, msdos7)/boot/grub,
grub rescue> insmod normal
error: missing ')'
grub rescue> insmod normal)
error:...

Unknown command "search".

As I have mentioned, Ubuntu is on dev/sda7.

search.file is an unknown command :/
But ubuntu is installed on dev/sda7 if that's what you're looking for

dev/sda2 is Windows 7, which the computer came pre-installed in.
I have not changed the bootflag location ever since, and installed Win 8 and Ubuntu besides Win 7.

Now, should I move the bootflag...

prefix=(hd0,msdos2)/boot/grub,
root=(hd0,msdos2),

I can post a GParted screenshot if necessary.

By the way, when I got to the command "insmod normal", it says error:unknown filesystem.
It is ntfs. What now?

What is chroot? It seems to have lots of uses but how does that apply to boot problems particularly?