Windows 7 won't boot -- "broken" MBR -- help please!

So some time ago I installed Ubuntu and I've ever since been irritated by having GRUB for my bootloader. Stupidly, yesterday I tried to change that. Here are all the steps I've taken so far:

1. Tried to change bootloader whilst I was logged into Windows 7. Rebooted and it had failed miserably. Error: "BOOTMGR is missing."
2. Forgetting I still had my Ubuntu Live "CD" on my USB stick, I, very stupidly, tried to install XP besides Windows 7 & Ubuntu in order to if nothing else gain access to the internet through something other than my PS3.
3. XP installed fine but I found it impossible to connect to the internet for whatever reason. I then remembered the Ubuntu Live CD/USB I had.
4. In Ubuntu, using a partition manager, I removed the XP partition but evidently I did so quite poorly. This merely resulted in a new error message upon booting up: "Windows failed to start [etc]. Insert your Windows 7 Installation Disc and restart [etc]. Choose the option to repair your computer [etc]. Status: 0xc000000e. Info: The boot selection failed because a required device is inaccessible."
5. I then installed Ubuntu fully, which restored my bootloader/MBR/whatever it's called to GRUB, however as soon as I attempted to start Windows 7 through the option on the list the previous error returned(#4).
6. Next I removed my Ubuntu partition as it had become inaccessible and reverted back to using the Live CD/USB. Using this I downloaded a Windows 7 installation ISO that I have placed on a separate hard drive ready to be read as if it were a CD/DVD. (at this point I should mention the copy of Windows 7 on my computer is completely legitimate, however it was pre-installed and I had no installation or repair DVD. I have a recovery CD from Packard Bell, but the only option is to format the entire hard drive. This meant my only option was downloading an ISO from ThePirateBay, but for good reason IMO)
7. I tried booting into the hard drive that contains the Windows 7 installation DVD data however I got the same error as in #4:
8. Then I installed Ubuntu onto a fresh partition... again. Just so that I could get GRUB back for the time being and access the internet for help.

Somewhere along the way, I can't remember where, I wrote down this: "Windows recovery environment: /dev/sda1 & [ext. HDD] -- Windows 7: /dev/sda2 -- Windows XP -- /dev/sda3"

Also, I can see from GParted here in Ubuntu that all of my Windows 7 data(personal documents and system files) is still entirely unmodified and accessible from within Ubuntu, but for some reason on /dev/sda3 which was marked as being for Windows XP.

Now on GParted this is what it's telling me: "/dev/sda1 | ntfs | PQSERVICE | 12GB -- /dev/sda2 | ntfs | SYSTEM RESERVED | 100MB -- /dev/sda3 | ntfs | Packard Bell[Windows 7 data] | 630GB -- /dev/sda4 | extended | [no label] | 288GB -- /dev/sda5[this is attached somehow to /dev/sda4] | ext4 | [no label] | 284GB -- /dev/sda6[this is attached somehow to dev/sda4] | linux-swap | [no label] | 4GB"

If anyone could help me be able to boot back into Windows 7 again I would be eternally grateful. Cheers!

Arc said:

Windows can be downloaded form digital river ... and you are t activate it using your own activation key.

First, you are mark the 100 MB system reserved partition as active. You can do it using GParted, or following the tutorial Partition - Mark as Active .

Then, run Startup Repair , at least for three times, with restarts in between every single run .

Inform that if it is working properly now .... and then it is to remove grub .

The system reserved partition is already set with the flag "boot" in GParted. Booting like this just gives me the error mentioned.

Arc said:

HelpPlease1 said:

The system reserved partition is already set with the flag "boot" in GParted. Booting like this just gives me the error mentioned.

Then, run Startup Repair , at least for three times, with restarts in between every single run .

Startup Repair - Run 3 Separate Times .

How am I supposed to do that if I can neither access Windows 7 nor my recovery disc?

Today I discovered another cause for the 0xc000000e error: If the Windows 7 partition is marked "hidden."

I un-hid it using Gparted, however, apparently it is also possible to unhide it using the Windows 7 DISKPART utilities:Easily Unhide an NTFS partition with included Windows Tools | Outrospective.org