Well, heres what you should do.
Why do you need the serial number of your Windows PC?
You may need this number there as well.
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It may also come in handy for properly storing the rig.
PC manufacturers dont always fill in the number correctly.
In this case, you will see something like 0, To be filled by O.E.M.
or a blank space instead of the actual serial number.
However, it’s possible for you to find the serial number of the motherboard and other components.
There you will see different information either on the label or on the case itself.
There is a chance of finding information inside the system unit.