#Windows installation id number install

Once the product key hash and Product Id are verified, they are both discarded. The check must be done on the Microsoft side because the list the information is validated against is very large (approximately one billion values).

Windows Update will compare the product key hash and Product ID to a list created from valid, Microsoft-manufactured product keys.

#Windows installation id number install

SP1 for Windows XP will fail to install on installations of Windows with one of the following product IDs:ДЄ hash (one-way mathematical transformation) of the product key used to install Windows XP The comparison and the list reside locally on the users PC and no information is sent to Microsoft as part of this process. To determine eligibility for the update, SP1 compares the Windows XP product ID on the system to this list. Windows XP SP1 ships with a list of the two product IDs (a product key produces the product ID found in My Computer > Properties after setup has completed) that are created by the pirated product volume license product keys. Microsoft has determined through investigations that most pirated installations are made with either of two volume license product keys (keys used by corporate or other volume license customers to install Windows XP). Product key inclusion in Installation ID for activation Eligibility for Windows XP Service Pack 1 and Windows UpdateДЄdditional grace periods for hardware out-of-tolerance situations