95ec0d2f82 If you reinstalled Windows 7 and has lost the product key, there is an excellent tool to help you find the lost product key on Windows 7. Getting the serial number of a USB device in Windows is a lot harder than it should be. Micro Center Tech Support shows you how to find your computer's serial number from within Windows. But you can often find a PCs serial number with a simple command, . How to Find Your Windows PCs Serial Number. . On Windows 7, press Windows + R . Posts about How to find USB serial number from windows written by ashfaq . The clue I had at start was the Windows 7 machine from which the device was stolen and .