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#11
A win 7 disk has all brands of win 7 (Home, HP, Pro and Ultimate), and you can use the disk to install any of them. All you have to do is to delete the \sources\ei.cfg file and it will ask what brand you want to install.
It will only activate with the appropriate key.
The installation wizard and the repair Wizard is the same for all brands.
What you can't do is to try to repair a Win 7 64 with a Win 7 32 installation disk (and vice versa)
Before you do anything else have a look here
Tweaking Optimizing Windows Operating System
Tweaking & Optimizing Windows Operating System
It fixed my issue 100%
Cheers
Daniel