Usually at a particular period after launching a Nou Opeare Windows System, Microsoft launches one, two or even three Service Pack-uri, meant to solve certain system bugs you are the stability to it (service packs are actually compilations made up of updates, safety patches and Fix sites received by the system up to a certain date).

Thus Windows XP received a gift three SP-uri, Windows Vista two, again Windows 7 one alone. Because as far as it seems, or no need for a Second Service Pack (hard to believe, even if Windows 7 has created a reputation of stable system), or Microsoft does not want to beat their heads with it (especially since the service of the packs proved to give them a headache, requiring enough time and something budget, which Microsoft prefers to use for Developing new Windows systems). In addition, considering that The new Windows operating system It has already been launched, the big concern at the moment is to succeed in the conviction of several users as Windows 8 represents the future, and in no case do they want to encourage them to continue to use a "outdated" system.
The fact that Windows 7 will not receive a second SP does not mean that the microsoft will no longer do safety updates for it, or that I will no longer be Patch-vulnerabilities (to be discovered, because there are no more doubt), these will be received periodically by users, at least until Windows 7 SP1 support will expire in February 2013 (ie at 24 months since its launch). And Microsoft has assured users as Windows 7, as a system, will receive support by 2020.
STEALTH SETINGS – Microsoft has no plan for releasing Windows 7 SP2
 
			