The security of Windows 7 sacrificed on the altar of ease of use?

All those who tested or who use Windows Vista can testify to it. The protective system (UAC) set up to avoid the installation of malware is incredibly constraining. It is necessary to undergo a very high number of warnings and to confirm an ever higher number of times to use certain software. For some, this is the price to pay for peace of mind, but overall many have found it bothersome.
Thus, Microsoft decided to soften its position in Windows 7. But this easing is paid for in term of security and already a means of disactivation of the UAC without warning has been found. If one can disactivate it in silence, the door is then opened for any manipulation. Microsoft indicates, in the way of Apple, that this is not a bug, but a feature and they do not foresee to regulate this nonproblem (for them) in the final version.
Let us pass on the fact that this problem affects Windows, since this is just a detail. The true problem is to find the best compromise between security and ease of use. The problem is not simple because as shown with the recent alarms of Trojan horse under OS X, the largest security breach of the computers is not today with the code, but something that prompts the user to validate sometimes dangerous to the integrity of its system.
In this case, Microsoft seems to have difficulties of finding the ideal compromise between the too restrictive safety of Vista and a broader but dangerous freedom found in Windows 7.