I had registered Windows long time ago. I lost the cd here. I am not having recovery nor I am having any record of the same like bill or other stuff. I want some help to locate my license key. I cannot find the product id. I am facing issue with slow system performance and I want to format the system. After installation I will need to use the key back again to activate my OS. Can anyone tell me how to find the license key in windows registry.
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