Sorry, but still don't understand if this tool works (or if DISM works I should say...). Apart from some errors due to the fact that DISM tries to remove packages that do not exist, the first time I used it the winload.efi has been corrupted, the second one I did not even understand what it did, but the system did not start anymore. I'm almost certain, but I have to do other tests, that the Common Drivers can not be removed, but there are other packages that can not be touched (even those you think are safe to remove; the problem is not the package itself, it's how it is removed...). Make a safe list please, we can not rely on Microsoft and DISM. OS: Windows 7 x64 HomePremium.