Major Activation Difficulties

So, at some point, my PC went wacko and slow, I decided to reinstall it.

Windows 7, 64 bit.

Somehow, probably due to Microsoft, I lost my old loader which I can't recall it's name of, and now I am stuck with an unactivated Windows 7.

That's one of the problems. I fully reinstalled Windows 7 via the DVD from the repository here, and tried to download a few loaders. One version of 7Loader, which wasn't the one I had sadly, was removed instantly by Windows at the point when it finished downloading. I know this isn't possible if I use a version of Windows which doesn't have the security patches, so I suspected more.

Did Windows install files on my disk, or perhaps in the bios, which prevents me from downloading these loaders? Or is it because I had Windows connected to the Internet?

Then, I went: Okay, let's try Daz's loader. I chose the default settings, ran it as I should have, and then bam - Windows wouldn't load.

Fix: bootsect.exe /nt60 c:
Problem: Windows 7 still not activated.

Now, I am reinstalling Windows 7 *again*, without it connected to the internet.
As Daz's loader isn't going to work, I'm in need of another method since the old working loader isn't around here anymore. I can not find it via the repository, which I used to do.

What alternatives do you have for me? I'm not going to mod my BIOS as I am unexperienced with that, and Microsoft patched those anyway with WAT.

tl;dr: Windows 7 is a bitch and I need a proper loader.