Cyraxote, nobody here can help you. There's clearly something about your particular hardware/software mix that the installer doesn't like. However, if you want to spend the time to resolve the problem then I suggest the following:
Backup your existing installation to an external drive.
Create a second partition, about 250 GB, on your hard drive.
Backup your existing installation to the second partition AND to an external source (or second physical drive).
Go to "Installed Updates" and make a list of all the MS updates. Download those updates to your new partition and download SP1 if your re-installation disk isn't SP1.
Download any special drivers that you'll need.
Go to "Programs and Features" and make a list of all the installed programs. At a minimum, download the anti-virus and firewall programs you're using to the second partition.
Reinstall the OS on your primary partition. Turn off Automatic Updates and try GOTD, see if it will install. If yes, install SP1 if you're not already on SP1 and retry GOTD. If that works, install your firewall and anti-virus, if different from what was installed, and retry. Install the remaining updates, testing GOTD after each (or do blocks of 5-10). Keep track of what you install and uninstall individually if GOTD won't install. If all the updates work then load your programs with the same process.
You're now saying "that could take days!". Yep, it's a long and tedious process that only you can do. Somewhere along the way you installed something that's causing the problem and only you can isolate the issue. You'll have to decide if it's worth the effort.
Note: you can also work backwards uninstalling programs and updates but there's no guarantee that they'll fully uninstall.
BTW, Win7 has a perfectly good backup utility that you can use. Images saved to your second partition aren't really backups, since they'd die if your hard drive died, but they are wonderful "go back" machines. They're great for those "oops, I really shouldn't have done that" moments. Since you appear to be in the habit of frequently installing new stuff you should look into ways to easily and painlessly "turn back the clock". And you've got all that free space...