Windows 7 installs in a certain way. The fact you have an active partition on drive 1 may be related, which is why I asked you to remove it to boot.
For future reference, the compatibility option may allow IE9 to work on that web site.
But you have what you have, so I suppose all I might recommend is to run a System File Check to see if your core files are OK. Open an administrative command prompt and type:
SFC /scannow
Maybe it will find some problems and replace some errant files.
If you decide to reinstall, you can do a repair install where you start the install from within Windows. If you have SP1 already installed, it seems you can now download an SP1 version of the Install DVD and use that. But a repair install will leave all your programs intact.
For now, I will assume the situation you are seeing is being caused by the way the backups were restored.