If you're lucky, this also contains the serial number. If you bought it, however, you should have some kind of paper or email record.

Order confirmation: Maybe you downloaded the software and thus don't have any physical media.

On newer systems, however, the product key is embedded in the UEFI BIOS. You might find your Windows product key on a sticker attached to your computer.

Storage media: Serial numbers are often printed onto the storage disc or product box the software came with.

Check whether you have one of the following: In that case, your last resort are physical objects or electronic records of the software you bought. In this case, I will use the function f(x) = x 2 + 53/x + 113 * (x/4).Maybe you no longer have access to your system, meaning you can't use any of the solutions above.

This class will contain a function which will apply a simple mathematical function on the serial number to get the activation key. This generator will be placed in a class called KeyGenerator. The second step is to create the key generator which will generate the activation key from a given serial number. Generating Activation Key from the Serial Number This function will give us the unique serial number of each MAC address (not totally unique, but similar to hash function uniqueness). Sum += sum + Integer.Parse(ch) * (index * 2)ĮlseIf Char.IsLetter(ch) Then Select Case ch.ToString.ToUpper Dim sum As Long = 0 Dim index As Integer = 1 For Each ch As Char In mac Say that x is the MAC and y is the serial, ' the function would be y += x + (i * 2) where i is the index ' of MAC address element.

' This is a simple function that we use to get a serial out ' of our MAC address. ' Here we iterate over available network adapters, ' picking the first possible one For Each mo As ManagementObject In moc ' Getting network adapters collection Dim moc As ManagementObjectCollection = mc.GetInstances Public Function GetSerial() As Long Dim mc As New ManagementClass('Win32_NetworkAdapterConfiguration')

Software serial numbers for free